Utilizing LVDS to Reduce EMI/EMC in Network Cameras
Utilizing LVDS to Reduce EMI/EMC in Network Cameras
Utilizing LVDS to Reduce EMI/EMC in Network Cameras
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<strong>LVDS</strong> <strong>Network</strong><br />
Camera System<br />
Panasonic Electronic Devices<br />
Panasonic Communications<br />
Communication<br />
Company<br />
Molex Japan<br />
Ansoft
Sem<strong>in</strong>ar Contents<br />
• Introduc<strong>in</strong>g Panasonic<br />
• Def<strong>in</strong><strong>in</strong>g the Project<br />
• Approach<strong>in</strong>g <strong>to</strong> the Project<br />
• Improv<strong>in</strong>g the Design<br />
• EYE Design Tools from Ansoft<br />
• Activity Introduction with Molex Japan<br />
• Conclusion
Ma<strong>in</strong> Doma<strong>in</strong>s of Panasonic Group<br />
AVC <strong>Network</strong>s<br />
Appliances<br />
Matsushita Electric Industrial Co., Ltd<br />
Head Office (Group&Global)<br />
Panasonic AVC <strong>Network</strong>s Company Semiconduc<strong>to</strong>r Company<br />
Panasonic Communications Co., Ltd. Panasonic Electronic Devices Co., Ltd.<br />
Panasonic Mobile Communications Co., Ltd. Matsushita Battery Industrial Co., Ltd.<br />
Panasonic Au<strong>to</strong>motive Systems Company Mo<strong>to</strong>r Company<br />
Panasonic System Solutions Company<br />
Panasonic Shikoku Electronics Co., Ltd.<br />
Devices<br />
Matsushita Electric Works, Ltd.<br />
PanaHome Corporation<br />
Matsushita Home Appliances Company Vic<strong>to</strong>r Company of Japan, Ltd.<br />
Healthcare Bus<strong>in</strong>ess Company<br />
Light<strong>in</strong>g Company Panasonic Fac<strong>to</strong>ry Solutions Co., Ltd.<br />
Matsushita Ecology Systems Co., Ltd. Matsushita Weld<strong>in</strong>g Systems Co.,Ltd.<br />
Others<br />
Others
Speaker BU<br />
スピーカ<br />
Module BU<br />
Electro-<br />
Mechanical BU<br />
モジュール<br />
Ma<strong>in</strong> Products <strong>in</strong> PED<br />
ﾏｲｸﾛｽﾋﾟｰｶ<br />
ﾁﾀﾝﾄﾞｰﾑｽﾋﾟｰｶ<br />
ﾃﾞｼﾞﾀﾙﾁｭｰﾅ<br />
機構部品<br />
ﾘﾓｺﾝ<br />
ﾚｼｰﾊﾞ<br />
基地局ﾓｼﾞｭｰ ﾙ<br />
Blue<strong>to</strong>oth SDIO-11b<br />
Pr<strong>in</strong>ted Circuit<br />
Board BU<br />
ﾀｯﾁﾊﾟﾈﾙ<br />
ﾗｲﾄﾀｯﾁｽｲｯﾁ<br />
多層基板<br />
ALIVH<br />
回路基板<br />
MLCC<br />
電気二重層<br />
ｺﾝﾃﾞﾝｻ<br />
コンデンサ<br />
機能性ｺﾝﾃ ﾞﾝｻ<br />
ﾁｯﾌﾟR(ｱﾚｲ)<br />
ﾊﾟﾜｰﾁｮｰｸｺｲﾙ<br />
電源ﾕ ﾆｯﾄ<br />
･<br />
Capaci<strong>to</strong>r G<br />
ﾁｯﾌﾟR<br />
ｺﾓﾝﾓｰﾄﾞ<br />
ﾉｲｽﾞﾌｨﾙﾀ<br />
ｲﾝﾊﾞｰﾀﾄﾗﾝｽ<br />
変成器<br />
Inductive<br />
Products BU<br />
Circuit<br />
Components BU<br />
回路部品
Global production and R&D base list<br />
●<br />
●<br />
■<br />
●<br />
PEDUK<br />
PEDEU<br />
PEDEU-TC<br />
PEDEU-SK<br />
PEDTH<br />
MAPREC<br />
PEDMA<br />
MEDEM<br />
PEDSG<br />
PEDSG-ST<br />
PEDSG-BT<br />
PEDIDA<br />
PEDHK<br />
PEDJM<br />
●<br />
●●●<br />
●<br />
■<br />
●<br />
◆◆■ ◆<br />
◆<br />
●<br />
▲<br />
▲<br />
●<br />
●<br />
PEDTJ<br />
PTCC<br />
PEDBJ<br />
PEDCBJ<br />
PEDQD<br />
PTW<br />
PMX<br />
P E D<br />
● Electronic part special produc<strong>in</strong>g company 16<br />
▲ Part overseas production bus<strong>in</strong>ess place 2<br />
◆ Jo<strong>in</strong>t venture company 4<br />
■ R&D base 4<br />
●<br />
●<br />
■<br />
●<br />
PEDCA<br />
PEDCA-TC<br />
PEDCA-BC<br />
PEDCA-TA<br />
● PACOB-AM
LCR Solution on PED WEB Site<br />
ise<br />
SMD<br />
http://panasonic.co.jp/ped/<br />
Device Library<br />
・・・Data<br />
Library<br />
for<br />
simulation<br />
imulation<br />
Suppression<br />
・・・Device ・・・ Device selection guide<br />
Capaci<strong>to</strong>r<br />
Selection<br />
・・・Device ・・・ Device selection guide<br />
Solutions<br />
Guide
Cus<strong>to</strong>mer/Set<br />
Catalog retrieval<br />
Sample order<br />
Circuit design and<br />
Experimental<br />
evaluation<br />
Device selection<br />
Experimental<br />
evaluation<br />
Purpose of Device Library<br />
【Conventional】 【Current】<br />
Shorten<strong>in</strong>g<br />
Catalog retrieval on WEB<br />
Circuit design(simulation)<br />
Device selection<br />
Sample order on WEB<br />
Experimental<br />
evaluation<br />
Circuit design process<br />
Simula<strong>to</strong>r<br />
High frequency circuit & system<br />
design <strong>to</strong>ol<br />
PED/Device<br />
http://<strong>in</strong>dustrial.panasonic.com/i/library.html<br />
Please downloads from Web<br />
and registers it as a component<br />
for the simula<strong>to</strong>r.<br />
Improvement of<br />
design perfection<br />
Efficiency<br />
improvement of<br />
design<br />
C<br />
R<br />
L<br />
Device<br />
Parameter<br />
S Parameter<br />
Equivalent circuit model<br />
例) Capaci<strong>to</strong>r<br />
●Chip multi-layer<br />
ceramic capaci<strong>to</strong>rs<br />
<br />
(270 parts numbers)<br />
●Chip resis<strong>to</strong>rs<br />
(186 parts numbers )<br />
●Chip <strong>in</strong>duc<strong>to</strong>rs<br />
(45 parts<br />
numbers )
Simulation analysis with substrate CAD data and Device Library<br />
Circuit simulation<br />
Simulation<br />
block diagram<br />
Common<br />
mode<br />
noise filter<br />
Simulation result<br />
Substrate CAD data<br />
Connec<strong>to</strong>r<br />
Device Library<br />
Evaluation block<br />
cutt<strong>in</strong>g out<br />
Electromagnetic field analysis<br />
S parameter<br />
of circuit board<br />
Transmission<br />
characteristic analysis<br />
Eye pattern analysis TDR analysis<br />
IC<br />
Material constant sett<strong>in</strong>g<br />
Device Library<br />
Chip varis<strong>to</strong>rs<br />
ESD Suppressor
Z(Ohm)<br />
Device selection and recommended<br />
pattern proposal<br />
60<br />
55<br />
50<br />
45<br />
40<br />
100 150 200 250 300<br />
Impedance<br />
design<br />
Plan<br />
L<strong>in</strong>e Width (um)<br />
4.2<br />
4.4<br />
4.6<br />
LCR solution activity flow<br />
Circuit design<br />
Selection of the<br />
Simulation Noise evaluation at <strong>EMC</strong> Site<br />
Electromag<br />
netic field<br />
analysis<br />
Circuit simulation<br />
Development step of set circuit design<br />
Mak<strong>in</strong>g<br />
for trial purposes<br />
best parts<br />
Radiation obstruction<br />
wave measurement<br />
①Solution correspond<strong>in</strong>g <strong>to</strong> design phase<br />
②Total solution with a lot of devices<br />
Evaluation<br />
Electromagnetic radiate<br />
field immunity<br />
exam<strong>in</strong>ation<br />
Conduction obstruction wave<br />
voltage measurement<br />
Mass<br />
production<br />
Analysis by<br />
electromagnetic field<br />
probe<br />
1200<br />
1000<br />
800<br />
600<br />
400<br />
200<br />
0<br />
-200<br />
-20 0 20 60 100 140 180<br />
時間 Tim e s (n S e c s)<br />
(nSec)<br />
電圧 Volts (V )<br />
(V)<br />
Radio<br />
frequency<br />
conduction<br />
obstruction<br />
exam<strong>in</strong>ation
Demand of Remote IP Moni<strong>to</strong>r<strong>in</strong>g<br />
I want <strong>to</strong> moni<strong>to</strong>r my branch<br />
shops at any time, any place.<br />
(Franchise retail s<strong>to</strong>re owner)<br />
I want <strong>to</strong> check the present<br />
Condition or change<br />
for large facility.<br />
(Park<strong>in</strong>g lot, warehouse)<br />
I want <strong>to</strong> check branches <strong>to</strong><br />
make sure if everyth<strong>in</strong>g is f<strong>in</strong>e<br />
(Branch, fac<strong>to</strong>ry, school)<br />
I want <strong>to</strong> improve cus<strong>to</strong>mer<br />
satisfaction, energy sav<strong>in</strong>g<br />
(Build<strong>in</strong>g, apartment, hotel)<br />
I want <strong>to</strong> <strong>in</strong>stall Security<br />
system, but expensive!<br />
I need someth<strong>in</strong>g at<br />
reasonable cost .<br />
I want <strong>to</strong> make HP<br />
more attractive.<br />
(Live moni<strong>to</strong>r<strong>in</strong>g)<br />
Remote IP Moni<strong>to</strong>r<strong>in</strong>g corresponds <strong>to</strong> such needs!!<br />
10<br />
Remote IP Moni<strong>to</strong>r<strong>in</strong>g
Remote IP Moni<strong>to</strong>r<strong>in</strong>g<br />
ZDM [ Zero Distance Management ]<br />
Owner’s<br />
Home or Office<br />
INTERNET<br />
Multiple- Offices<br />
S<strong>to</strong>re C<br />
Security use at night<br />
Multiple- Franchises<br />
Cashier<br />
S<strong>to</strong>re A<br />
Supervis<strong>in</strong>g and <strong>in</strong>struct<strong>in</strong>g employees<br />
Grocery S<strong>to</strong>res<br />
Moni<strong>to</strong>r<strong>in</strong>g traffic of visi<strong>to</strong>rs<br />
S<strong>to</strong>re B<br />
Improve the Quality of Management by IP Moni<strong>to</strong>r<strong>in</strong>g
12<br />
Remote IP Moni<strong>to</strong>r<strong>in</strong>g<br />
ZDM [ Zero Distance Management ]<br />
Remote IP Moni<strong>to</strong>r<strong>in</strong>g<br />
Provides effective solution and benefit<br />
<strong>to</strong> improve the Quality of Management<br />
•Distance Free!<br />
•High Reliability!<br />
•Save Time & Cost!<br />
•Integration with<br />
IP-PBX, POS, ATM!<br />
Multi Display<br />
PBX<br />
PC<br />
<strong>Network</strong><br />
<strong>Network</strong><br />
Video Recorder<br />
ATM<br />
POS<br />
PC
<strong>Network</strong> Camera<br />
Remote IP Moni<strong>to</strong>r<strong>in</strong>g<br />
BB-HCM580<br />
Zoom<br />
L<strong>in</strong>e up<br />
PoE<br />
BB-HCM581<br />
BB-HCM511<br />
BB-HCM531<br />
Out Door<br />
BB-HCM515<br />
BL-C131<br />
BL-C111<br />
Wireless<br />
Pan/Tilt<br />
In Door
Introduc<strong>in</strong>g<br />
Project Def<strong>in</strong>itions
Motivation of the Project<br />
• Panasonic <strong>to</strong> employ Computer Aided<br />
Eng<strong>in</strong>eer<strong>in</strong>g <strong>in</strong> their System.<br />
– Time <strong>to</strong> Market…Initial Design <strong>to</strong> Product<br />
– Robust Design<br />
• EYE Design<br />
• <strong>EMI</strong>/<strong>EMC</strong> Regulation<br />
• Establish the methodology of design<strong>in</strong>g<br />
products us<strong>in</strong>g Simula<strong>to</strong>r <strong>in</strong>stead of Cut<br />
and Try method.
Why not Cut and Try?<br />
• If Eng<strong>in</strong>eer is lucky, then it will probably f<strong>in</strong>d<br />
solution quickly modify<strong>in</strong>g the design.<br />
• It all depends on the eng<strong>in</strong>eer’s skill and<br />
experiences.<br />
• Just mak<strong>in</strong>g the pro<strong>to</strong>type board takes 2 months<br />
and measurements takes additional one month.<br />
• CAE based approach not just reveal all the<br />
problems but also gives path <strong>to</strong> greatly<br />
enhance their products.
Ansoft Tools ready <strong>to</strong> Solve their<br />
requirements?<br />
• <strong>LVDS</strong> system <strong>in</strong> <strong>Network</strong> Camera is huge. No<br />
Electromagnetic Simula<strong>to</strong>r can possibly solve the entire<br />
problem.<br />
• Ansoft has suggested <strong>to</strong> use comb<strong>in</strong>ation of<br />
Electromagnetic Simula<strong>to</strong>r as well as Circuit<br />
Simula<strong>to</strong>r <strong>to</strong> f<strong>in</strong>d the causes of their pro<strong>to</strong>type board.<br />
• PED/PCC/Molex Japan <strong>to</strong>gether with Ansoft formed<br />
project <strong>to</strong> establish design flow us<strong>in</strong>g pro<strong>to</strong>type boards.<br />
(System and Boards which failed.)<br />
• Knowledge and experiences obta<strong>in</strong>ed through this<br />
project has been implemented <strong>in</strong> Panasonic for future<br />
products.
<strong>LVDS</strong><br />
TX<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
[dB(μV/m)]<br />
60<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
Ma<strong>in</strong>ta<strong>in</strong> Quality 50 Eye Diagram<br />
40<br />
20<br />
10<br />
Project Scope<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗｲﾝ<br />
Suppress Radiation Noise (<strong>EMI</strong>/<strong>EMC</strong>)<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
0<br />
30 50 100 500<br />
1000<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx<br />
30 Implication is <strong>to</strong> reduce Common Mode Degeneration<br />
レベル<br />
through out the system<br />
周波数<br />
[M Hz]
<strong>LVDS</strong><br />
TX<br />
Approaches <strong>to</strong> the<br />
Project<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx<br />
Duplicate the System <strong>in</strong> Simulation<br />
Match <strong>to</strong> the Measurements if available<br />
Use the system <strong>to</strong> improve the performance
Port2<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
<strong>LVDS</strong><br />
TX<br />
Port1<br />
SiWave Analysis<br />
HFSS Analysis<br />
1<br />
2<br />
5<br />
6<br />
VIDEO Board<br />
ref<br />
0<br />
7<br />
8<br />
3<br />
4<br />
FPC and Molex Connec<strong>to</strong>rs<br />
VIDEO Board<br />
U2<br />
<strong>LVDS</strong> FPC and Connec<strong>to</strong>r<br />
Port1<br />
Port3<br />
Port2<br />
FPC and Molex Connec<strong>to</strong>r<br />
Port4<br />
1<br />
2<br />
TILT Board<br />
ref<br />
0<br />
FFC and Molex Connec<strong>to</strong>rs<br />
<strong>LVDS</strong> VIDEO Tx基板 Board<br />
TILT 中継基板<br />
Board <strong>LVDS</strong> CPU Rx基板 Board<br />
Port2<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
Port1<br />
PlanarEM<br />
Nexxim W-element<br />
2<br />
1<br />
4<br />
3<br />
FPC<br />
ref<br />
0<br />
0n1<br />
n2<br />
n3 n4<br />
n6 n5<br />
n7<br />
0<br />
n8<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
n1 n2<br />
U2<br />
seg1<br />
n3 n4<br />
Port1 Port5<br />
Port2 Port6<br />
Port3 Port7<br />
Port4 Port8<br />
<strong>LVDS</strong>差動<br />
ﾗｲﾝ<br />
U4<br />
seg2<br />
Port1 Port2 0<br />
n6 n5 Port3 Port4<br />
Port5 Port6<br />
n8 n7 Port7 Port8 0<br />
ref<br />
1<br />
2<br />
3<br />
4<br />
Port3<br />
Port4<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
SiWave Analysis<br />
HFSS Analysis<br />
5<br />
6<br />
7<br />
8<br />
<strong>LVDS</strong><br />
Rx<br />
3<br />
4<br />
Port1<br />
Port2<br />
U11<br />
FFC and Connec<strong>to</strong>r<br />
FFC and Molex Connec<strong>to</strong>r<br />
Port3 1<br />
Port4<br />
PlanarEM<br />
Nexxim W-element<br />
Port2<br />
Port1<br />
3<br />
4<br />
1<br />
2<br />
ref<br />
FFC Mid Section<br />
FFC<br />
FFC<br />
n1 n2 n1<br />
n2 n1 n2<br />
n3 n4 n3<br />
n5 n6 n5<br />
n7 n8 n7<br />
n4 n3 n4<br />
n6 n5 n6<br />
n8 n7 n8<br />
2<br />
ref<br />
1<br />
2<br />
3<br />
4<br />
Port3<br />
5<br />
6<br />
Port4<br />
8<br />
CPU Board<br />
ref<br />
0<br />
7<br />
3<br />
4<br />
Port3<br />
SiWave Analysis<br />
HFSS Analysis<br />
Port4
Port2<br />
Port1<br />
1<br />
2<br />
5<br />
6<br />
Exam<strong>in</strong>e Total System<br />
FPC and Molex Connec<strong>to</strong>rs<br />
FFC and Molex Connec<strong>to</strong>rs<br />
VIDEO Board<br />
ref<br />
0<br />
7<br />
8<br />
3<br />
4<br />
U2<br />
<strong>LVDS</strong> FPC and Connec<strong>to</strong>r<br />
Port1<br />
Port3<br />
Port2<br />
FPC and Molex Connec<strong>to</strong>r<br />
Port4<br />
1<br />
2<br />
TILT Board<br />
ref<br />
0<br />
VIDEO <strong>LVDS</strong> Tx基板 Board<br />
TILT 中継基板<br />
Board <strong>LVDS</strong> CPU Rx基板 Board<br />
5<br />
6<br />
7<br />
8<br />
3<br />
4<br />
Port1<br />
Port2<br />
U11<br />
FFC and Connec<strong>to</strong>r<br />
FFC and Molex Connec<strong>to</strong>r<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
We may want <strong>to</strong> do<br />
60.00<br />
someth<strong>in</strong>g<br />
for this<br />
Port3 1<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns ]<br />
6.00 7.00 8.00 9.00 10.00<br />
Port4<br />
2<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
5<br />
6<br />
8<br />
CPU Board<br />
ref<br />
0<br />
7<br />
3<br />
4<br />
Port3<br />
Port4
<strong>LVDS</strong><br />
TX<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
LVDX Tx Board<br />
Y1<br />
0.00<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
-100.00<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx<br />
0~8GHz<br />
Ansoft Corporation XY Plot 1<br />
VIDEO board<br />
Curve Inf o<br />
dB(S(Port1,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port5))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port6))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port7))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port8))<br />
L<strong>in</strong>earFrequency<br />
-120.00<br />
dB(S(Port2,Port1))<br />
0.00 1.00 2.00 3.00 4.00<br />
F [GHz]<br />
5.00 6.00<br />
L<strong>in</strong>earFrequency<br />
7.00 8.00
Pad<br />
Video Board Time Doma<strong>in</strong><br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
Via<br />
• It is a little high<br />
• Needs <strong>to</strong> <strong>in</strong>vestigate for the thickness of the board<br />
112Ω<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns ]<br />
6.00 7.00 8.00 9.00 10.00
~100Ω<br />
Differential L<strong>in</strong>e<br />
May cause Skew if the components are placed.<br />
~54Ω<br />
Differential L<strong>in</strong>e
Port2<br />
<strong>LVDS</strong><br />
TX<br />
Port1<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
2<br />
1<br />
4<br />
3<br />
ref<br />
0<br />
0<br />
n1 n2<br />
0<br />
n3 n4<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
n5<br />
n6<br />
n7<br />
n8<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
Molex (25435-2771)<br />
FPC<br />
W-Element W-Element<br />
Port1 Port5<br />
Port3 Port7<br />
U2<br />
seg1<br />
Port2 Port6<br />
Port4 Port8<br />
n1 n2<br />
n3 n4<br />
n5<br />
n6<br />
n7<br />
n8<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
U4<br />
seg2<br />
FFC<br />
Port1 Port2<br />
Port3 Port4<br />
Port5 Port6<br />
Port7 Port8<br />
0<br />
0<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
ref<br />
1<br />
2<br />
3<br />
4<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
-100.00<br />
<strong>LVDS</strong><br />
Rx<br />
Port3<br />
Port4<br />
Ansoft Corporation <strong>LVDS</strong> Signal Pass<br />
Name X Y<br />
XY Plot 1<br />
m1 257.0000 -2.5648<br />
0.00<br />
m1 Curve Info<br />
Y1<br />
dB(S(Port1,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port4,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port4,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port4,Port3))<br />
L<strong>in</strong>earFrequency<br />
-120.00<br />
0.00 100.00 200.00 300.00 400.00 500.00<br />
F [MHz]
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
FPC Straight and Bobb<strong>in</strong> effect<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR<br />
150.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
100.00<br />
90.00<br />
Measurement stays <strong>in</strong> this range<br />
Loose W<strong>in</strong>d<strong>in</strong>g<br />
S<strong>in</strong>gle Layer FPC<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns]<br />
6.00 7.00 8.00 9.00 10.00<br />
<strong>LVDS</strong><br />
TX<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
150.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
~15Ω<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
Tight W<strong>in</strong>d<strong>in</strong>g<br />
Multi-Layer FPC<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00<br />
Tim e [ns]<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx
<strong>LVDS</strong><br />
TX<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
TILT Board<br />
Ansoft Corporation XY Plot 1<br />
TILT board<br />
Y1<br />
0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx<br />
Curve Inf o<br />
dB(S(Port1,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port2))<br />
L<strong>in</strong>earFrequency<br />
-70.00<br />
dB(S(Port3,Port3))<br />
0.00 1.00 2.00 3.00 4.00<br />
F [GHz]<br />
5.00 6.00<br />
L<strong>in</strong>earFrequency<br />
7.00 8.00
TILT Board Time Doma<strong>in</strong><br />
Ansoft Corporation <strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
TILT<br />
VIA<br />
Impedance<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR<br />
150.00<br />
Curve Inf o<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Time [ns]<br />
6.00 7.00 8.00 9.00 10.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns ]<br />
6.00 7.00 8.00 9.00 10.00<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
TILT 0~2GHz<br />
TILT 0~8GHz<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
-V(Diff1)/I(Diff1)<br />
Transient
Port2<br />
Port1<br />
3<br />
4<br />
1<br />
2<br />
<strong>LVDS</strong><br />
TX<br />
ref<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
n3 n4<br />
n5 n6<br />
n7 n8<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
Molex Connec<strong>to</strong>r<br />
FFC<br />
FFC<br />
FFC Mid Section<br />
FFC<br />
FFC<br />
n1 n2 n1<br />
n2 n1 n2<br />
n3<br />
n5<br />
n7<br />
n4<br />
n6<br />
n8<br />
n3 n4<br />
n5 n6<br />
n7 n8<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx<br />
ref<br />
2<br />
4<br />
1<br />
3<br />
Port3<br />
Port4
FFC Geometry<br />
B1:5±1.5<br />
B2:5±1.5<br />
M:0.5±0.1
B1:5±1.5<br />
PQJE10183XA-SV.pdf<br />
.layerstack FFC_edge<br />
+ layer = (air, 'Air_thickness'),<br />
+ layer = (Base, 188um) ,<br />
+ layer = (Polyester, 40um) ,<br />
+ layer = (Base, 'FFC_Base_Thickness') ,<br />
+ layer = (Polyester, 'FFC_polyester_Thickness+FFC_Conduc<strong>to</strong>r_Thickness') ,<br />
+ layer = (air, 'Air_thickness+FFC_polyester_Thickness+FFC_Base_Thickness')<br />
B2:5±1.5<br />
M:0.5±0.1<br />
.layerstack FFC_mid<br />
+ layer = (air, 'Air_thickness+188um+40um'),<br />
+ layer = (Base, 'FFC_Base_Thickness') ,<br />
+ layer = (Polyester, '2*FFC_polyester_Thickness+FFC_Conduc<strong>to</strong>r_Thickness') ,<br />
+ layer = (Base, 'FFC_Base_Thickness') ,<br />
+ layer = (air, 'Air_thickness')
Port2<br />
Port1<br />
3<br />
1<br />
4<br />
2<br />
ref<br />
B1:5±1.5<br />
FFC<br />
n1 n2<br />
n3 n4<br />
n5 n6<br />
n7 n8<br />
PQJE10183XA-SV.pdf<br />
n1<br />
n3<br />
n5<br />
n7<br />
FFC Mid Section<br />
n2<br />
n4<br />
n6<br />
n8<br />
FFC<br />
n1 n2<br />
n3 n4<br />
n5 n6<br />
n7 n8<br />
B2:5±1.5<br />
ref<br />
M:0.5±0.1<br />
2<br />
4<br />
1<br />
3<br />
Port3<br />
Port4
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
FFC Time Doma<strong>in</strong><br />
Port2<br />
Port1<br />
3<br />
4<br />
1<br />
2<br />
ref<br />
FFC Mid Section<br />
FFC<br />
FFC<br />
n1 n2 n1<br />
n2 n1 n2<br />
n3 n4 n3<br />
n5 n6 n5<br />
n7 n8 n7<br />
n4 n3 n4<br />
n6 n5 n6<br />
n8 n7 n8<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns ]<br />
6.00 7.00 8.00 9.00 10.00<br />
ref<br />
1<br />
2<br />
3<br />
4<br />
Port3<br />
Port4
Y1<br />
<strong>LVDS</strong><br />
TX<br />
Ansoft Corporation XY Plot 1<br />
CPU<br />
0.00<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
-100.00<br />
<strong>LVDS</strong> Tx基板 Tx基板<br />
中継基板<br />
<strong>LVDS</strong> Rx基板 Rx基板<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FPC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
Curve Inf o<br />
dB(S(Port1,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port5))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port6))<br />
L<strong>in</strong>earFrequency<br />
FFC<br />
-120.00<br />
0.00 0.50 1.00<br />
F [GHz]<br />
1.50 2.00<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
<strong>LVDS</strong><br />
Rx<br />
<strong>LVDS</strong> Rx Board
Port2<br />
Y1<br />
10.00<br />
0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
Port1<br />
1<br />
2<br />
5<br />
6<br />
7<br />
8<br />
VIDEO Board<br />
ref<br />
<strong>LVDS</strong> System Review<br />
3<br />
4<br />
FPC and Molex Connec<strong>to</strong>rs<br />
U8<br />
FPC and Connec<strong>to</strong>r<br />
Port1<br />
Port2<br />
FPC and Molex Connec<strong>to</strong>r<br />
Port3<br />
Port4<br />
1<br />
2<br />
5<br />
6<br />
8<br />
TILT Board<br />
ref<br />
FFC and Molex Connec<strong>to</strong>rs<br />
VIDEO <strong>LVDS</strong> Tx基板 Board<br />
TILT 中継基板<br />
Board <strong>LVDS</strong> CPU Rx基板 Board<br />
Ansoft Corporation XY Plot 1<br />
<strong>LVDS</strong> System<br />
Curve Inf o<br />
dB(S(Port1,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port2))<br />
L<strong>in</strong>earFrequency<br />
-70.00<br />
0.00 0.50 1.00<br />
F [GHz]<br />
1.50 2.00<br />
7<br />
3<br />
4<br />
Port1<br />
U7<br />
FFC and Connec<strong>to</strong>r<br />
Port3 1<br />
FFC and Molex Connec<strong>to</strong>r<br />
2<br />
Port2<br />
Port4<br />
5<br />
7<br />
6<br />
8<br />
CPU Board<br />
ref<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns]<br />
6.00 7.00 8.00 9.00 10.00<br />
3<br />
4<br />
Port3<br />
Curve Inf o<br />
Port4<br />
-V(Diff1)/I(Diff1)<br />
Transient
Improv<strong>in</strong>g the<br />
Design<br />
• VIDEO Board<br />
• FPC Board<br />
• Impedance match<strong>in</strong>g through the FPC l<strong>in</strong>e<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns ]<br />
6.00 7.00 8.00 9.00 10.00<br />
• Impedance match<strong>in</strong>g and Skew Reduction <strong>in</strong> VIDEO Board<br />
– EYE Design and Reduction of Differential <strong>to</strong> Common Mode<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient
Improv<strong>in</strong>g<br />
Impedance Match<strong>in</strong>g on the<br />
FPC<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
Curve Info<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Time [ns]<br />
6.00 7.00 8.00 9.00 10.00
Polyamide Sheet<br />
Match<strong>in</strong>g FPC<br />
By plac<strong>in</strong>g Polyamide sheet on <strong>to</strong>p of FPC, Electromagnetic<br />
fields are captured <strong>in</strong> the vic<strong>in</strong>ity of the Differential L<strong>in</strong>e.<br />
Hence the Capaci<strong>to</strong>r <strong>in</strong>crease result<strong>in</strong>g <strong>to</strong> decrease the<br />
Characteristic impedances<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
-V(Diff1)/I(Diff1)<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
Curve Info<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns ]<br />
6.00 7.00 8.00 9.00 10.00
F<strong>in</strong>d<strong>in</strong>g Characteristic<br />
Impedance <strong>in</strong> Frequency Doma<strong>in</strong><br />
Use Open/Short conditions<br />
<strong>to</strong> compute the Impedances<br />
By select<strong>in</strong>g the transformer<br />
ratio, differential impedance<br />
can be computed by<br />
Zo=sqrt(Zopen*Zshort)<br />
Open<br />
1<br />
0<br />
Short<br />
1<br />
0<br />
2<br />
3<br />
2<br />
3<br />
R220<br />
R225<br />
25<br />
25<br />
0<br />
0<br />
0<br />
n1<br />
n2<br />
n3 n4<br />
n5 n6<br />
n7<br />
0<br />
n8<br />
0<br />
0 n1 n2<br />
0<br />
n3 n4<br />
n5 n6<br />
n7 n8<br />
0
Match<strong>in</strong>g FPC Impedance<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
Polyamide Sheets<br />
110.00<br />
100.00<br />
90.00<br />
Ansoft Corporation Impedance<strong>LVDS</strong><br />
TDR folded with modified FPC<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
On both side<br />
Ansoft Corporation XY Plot 1<br />
FPC Improve<br />
mag(sqrt(Z(Open,Open)*Z(Short,Short)))<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
80.00<br />
70.00<br />
60.00<br />
<strong>Reduce</strong> portion of FPC<br />
impedance Mismatch<br />
50.00<br />
Curve Inf o<br />
1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00<br />
Time [ns]<br />
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00<br />
F [GHz]<br />
Curve Inf o<br />
mag(sqrt(Z(Open,Open)*Z(Short,Short)))<br />
L<strong>in</strong>earFrequency<br />
75um Polyamide sheets on both<br />
side of FPC<br />
*=============================================<br />
.param FPC_Base=25.4um<br />
.param FPC_Conduc<strong>to</strong>r=35um<br />
.param Air_thickness=800um<br />
.param FPC_Thickness='Air_thickness+3*FPC_Base'<br />
.param FPC_Thickness_stacked='Air_thickness+(2*FPC_Base+FPC_Conduc<strong>to</strong>r)+FPC_Base'<br />
*=============================================<br />
.layerstack FPCBoard<br />
+ layer = (air, 'Air_thickness'),<br />
+ layer = (Polymide, '6*FPC_Base+FPC_Conduc<strong>to</strong>r') ,<br />
+ layer = (air, 'Air_thickness')
Cover<strong>in</strong>g with Polyamide Sheets<br />
Ansoft Corporation Impedance<strong>LVDS</strong><br />
TDR folded with modified FPC<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00<br />
Time [ns]<br />
Ansoft Corporation Impedance<strong>LVDS</strong><br />
TDR folded with modified FPC<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00<br />
Time [ns]
Improv<strong>in</strong>g<br />
Impedance Match<strong>in</strong>g<br />
and<br />
Skew<br />
on the <strong>LVDS</strong> Tx board
Skew and Impedance Match<strong>in</strong>g<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
150.00<br />
Curve Inf o<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns]<br />
6.00 7.00 8.00 9.00 10.00<br />
on <strong>LVDS</strong> Tx Board<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
Skew<br />
Match<strong>in</strong>g<br />
Strategy<br />
Change size of Ground Hall<br />
Impedance Match<strong>in</strong>g Strategy
Crossed Dual Via Model <strong>in</strong> HFSS<br />
LumpPort1:1<br />
Port1<br />
Port2<br />
LumpPort2:1<br />
ref<br />
LumpPort3:1<br />
Port3<br />
LumpPort4:1<br />
0<br />
Port4<br />
Nexxim Dynamic L<strong>in</strong>k <strong>to</strong> HFSS<br />
Sweep on the parameters on the HFSS<br />
Ansoft Corporation XY Plot 1<br />
Cross Dual Via<br />
dB(S(Port3,Port1))<br />
0.00<br />
-0.02<br />
-0.04<br />
-0.06<br />
-0.08<br />
-0.10<br />
-0.12<br />
-0.14<br />
0.00 0.50 1.00 1.50 2.00<br />
F [GHz]<br />
2.50 3.00 3.50 4.00<br />
Keepout radius=400~500um gives the maximum transfer through the<br />
Frequency range of 0~4GHz<br />
Curve Inf o<br />
dB(S(Port3,Port1))<br />
keepout=300um<br />
dB(S(Port3,Port1))<br />
keepout=400um<br />
dB(S(Port3,Port1))<br />
keepout=500um<br />
dB(S(Port3,Port1))<br />
keepout=600um
Layout Design us<strong>in</strong>g PlanarEM<br />
Port2<br />
Port1<br />
1<br />
2<br />
1<br />
2<br />
<strong>in</strong> Ansoft Designer 4.0<br />
ref<br />
1<br />
0<br />
Port3 Port4<br />
3<br />
4<br />
2<br />
Port1<br />
Port2<br />
Port3 Port4<br />
Ansoft Corporation XY Plot 1<br />
Modified VIDEO Board 070707<br />
Y1<br />
0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
-80.00<br />
-90.00<br />
Curve Inf o<br />
dB(S(Vide<br />
L<strong>in</strong>earFrequency<br />
dB(S(Vide<br />
L<strong>in</strong>earFrequency<br />
dB(S(Vide<br />
L<strong>in</strong>earFrequency<br />
-100.00<br />
dB(S(Vide<br />
L<strong>in</strong>earFrequency<br />
0.00 0.50 1.00 1.50 2.00<br />
F [GHz]<br />
2.50 3.00 3.50 4.00
F<strong>in</strong>al Design Modification<br />
450um<br />
350um<br />
W=220um<br />
S=150um<br />
150um<br />
220um<br />
Port1<br />
Port2<br />
300um<br />
Port3 Port4<br />
250m<br />
110um
Y1<br />
20.00<br />
0.00<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
-100.00<br />
Port1 3<br />
4Port2<br />
Modified Total System<br />
Port2<br />
Port1<br />
<strong>LVDS</strong> Tx基板<br />
U1<br />
Cross Dual Via<br />
Port4<br />
Port3<br />
1<br />
2<br />
ref<br />
0<br />
3<br />
4<br />
Modified<br />
U3<br />
Modified VIDEO Board 070707<br />
Modified Video Board<br />
U5<br />
<strong>LVDS</strong> FPC and Connec<strong>to</strong>r4<br />
Video_<strong>in</strong>1<br />
Video_out1 Port1<br />
Video_<strong>in</strong>2<br />
Port2<br />
1<br />
FPC and Molex Connec<strong>to</strong>r<br />
Ansoft Corporation XY Plot 1<br />
<strong>LVDS</strong> System_folded_FPC2<br />
Video_out2<br />
2<br />
Port3<br />
Port4<br />
1<br />
2<br />
Curve Inf o<br />
dB(S(Port1,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port1,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port3))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port2,Port4))<br />
L<strong>in</strong>earFrequency<br />
dB(S(Port3,Port1))<br />
L<strong>in</strong>earFrequency<br />
-120.00<br />
0.00 0.50 1.00 1.50 2.00<br />
F [GHz]<br />
2.50 3.00 3.50 4.00<br />
5<br />
7<br />
6<br />
8<br />
TILT Board<br />
ref<br />
中継基板<br />
TILT Board CPU Board<br />
90.00<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded with modified FPC and video board<br />
-V(Diff1)/I(Diff1)<br />
FFC and Molex Connec<strong>to</strong>rs<br />
150.00<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
3 Port1<br />
4 Port2<br />
U7<br />
FFC and Connec<strong>to</strong>r4<br />
FFC and Molex Connec<strong>to</strong>r<br />
Port3<br />
Port4<br />
1<br />
2<br />
5<br />
7<br />
6<br />
8<br />
CPU Board<br />
ref<br />
<strong>LVDS</strong> Rx基板<br />
-V(Diff1)/I(Diff1)<br />
140.00<br />
130.00<br />
120.00<br />
110.00<br />
100.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Time [ns]<br />
6.00 7.00 8.00 9.00 10.00<br />
3<br />
4<br />
Port3<br />
Port4<br />
Ansoft Corporation Impedance<br />
<strong>LVDS</strong> TDR folded<br />
150.00<br />
Curve Inf o<br />
Curve Info<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
-V(Diff1)/I(Diff1)<br />
Transient<br />
50.00<br />
0.00 1.00 2.00 3.00 4.00 5.00<br />
Tim e [ns]<br />
6.00 7.00 8.00 9.00 10.00
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
R163<br />
0<br />
PRBS Simulation<br />
50<br />
V159<br />
R164<br />
50<br />
V160<br />
0 Measurements<br />
Simulation<br />
Ansoft Corporation Eye<br />
<strong>LVDS</strong> with PRBS measurements<br />
2.00<br />
Curve Inf o<br />
-2.00<br />
0.00 2.00 4.00 6.00 8.00<br />
Time [ns]<br />
10.00 12.00 14.00 16.00<br />
2.00<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
<strong>LVDS</strong> Tx Tx基板 Tx Tx基板 基板 中継基板<br />
<strong>LVDS</strong> Rx Rx基板 Rx Rx基板 基板<br />
<strong>LVDS</strong><br />
TX<br />
ｺ ｺ<br />
ﾈ<br />
ｸ<br />
FPC ﾈ<br />
ｸ<br />
ﾀ ﾀ<br />
<strong>LVDS</strong>差動ﾗ<br />
ｲﾝ<br />
<strong>LVDS</strong><br />
Rx<br />
Vdiff<br />
Transient<br />
-2.00<br />
0.00 0.50 1.00<br />
Time [us]<br />
1.50 2.00<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
FFC<br />
ｺ<br />
ﾈ<br />
ｸ<br />
ﾀ<br />
3<br />
4<br />
Port2<br />
ref<br />
Port1<br />
0<br />
1<br />
2<br />
Port2<br />
Modified<br />
U3<br />
Modified VIDEO Board 070707<br />
Modified Video Board<br />
U5<br />
<strong>LVDS</strong> FPC and Connec<strong>to</strong>r4<br />
1<br />
3<br />
Port1<br />
Port3<br />
2<br />
4<br />
FPC and Molex Connec<strong>to</strong>r<br />
Port4<br />
R151<br />
1<br />
2<br />
V<br />
Modified Video/FPC<br />
50<br />
5<br />
6<br />
8<br />
TILT Board<br />
ref<br />
0<br />
R152<br />
TILT Board CPU Board<br />
<strong>LVDS</strong> Tx基板 <strong>LVDS</strong> Rx基板<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
7<br />
V<br />
50<br />
FFC and Molex Connec<strong>to</strong>rs<br />
3Port1<br />
U7<br />
FFC and Connec<strong>to</strong>r4<br />
Port3 1<br />
FFC and Molex Connec<strong>to</strong>r<br />
2<br />
4Port2<br />
Port4<br />
0<br />
5<br />
7<br />
6<br />
8<br />
CPU Board<br />
ref<br />
Ansoft Corporation Eye<br />
<strong>LVDS</strong> with PRBS new system<br />
2.00<br />
Curve Info<br />
-2.00<br />
0.00 2.00 4.00 6.00 8.00<br />
Time [ns]<br />
10.00 12.00 14.00 16.00<br />
2.00<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
中継基板<br />
Vdiff<br />
Transient<br />
-2.00<br />
0.00 0.50 1.00<br />
Time [us]<br />
1.50 2.00<br />
3<br />
4<br />
Port3<br />
Port4
80.00<br />
60.00<br />
40.00<br />
20.00<br />
-0.00<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
Output Common Noise<br />
Ansoft Corporation Common Noise<br />
<strong>LVDS</strong> with PRBS measurements<br />
100.00<br />
Curve Inf o<br />
Vcom [mV]<br />
Vcom<br />
Transient<br />
-100.00<br />
0.00 0.50 1.00<br />
Time [us]<br />
1.50 2.00<br />
Ansoft Name Corporation X Y<br />
XY Plot 1<br />
R163<br />
<strong>LVDS</strong> with PRBS new system<br />
m1 0.00<br />
m2<br />
m3<br />
20.0000<br />
30.0000<br />
40.0000<br />
-55.6890<br />
-55.3825<br />
-62.7354<br />
50<br />
Curve Inf o V159<br />
dB(Vcom)<br />
Transient<br />
m4 50.0000 -58.8138<br />
0<br />
dB(Vcom)<br />
-10.00 m5 60.0000 -56.4834<br />
m6 70.0000 -54.9845<br />
m7 180.0000 -64.7677<br />
m8 190.0000 -65.2964<br />
m9 200.0000 -64.2190<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
m1<br />
m2<br />
m3<br />
m4<br />
m5<br />
m6<br />
-80.00<br />
10.00 100.00<br />
Spectrum [MHz]<br />
1000.00<br />
m7 m8 m9<br />
V<br />
R164<br />
50<br />
V160<br />
0<br />
V<br />
Ansoft Corporation Common Noise<br />
<strong>LVDS</strong> with PRBS new system<br />
100.00<br />
Curve Info<br />
Vcom [mV]<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
40.00<br />
30.00<br />
20.00<br />
10.00<br />
-0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
-80.00<br />
-90.00<br />
Vcom<br />
Transient<br />
-100.00<br />
0.00 0.50 1.00<br />
Time [us]<br />
1.50 2.00<br />
1<br />
2<br />
ref<br />
V<br />
Ansoft Corporation<br />
R151<br />
3 100.00<br />
50<br />
4<br />
EXC24CE900<br />
90.00<br />
0<br />
V<br />
R152<br />
50<br />
XY Plot 3<br />
<strong>LVDS</strong> with PRBS new system<br />
Curve Info<br />
V(out1)+V(out2)<br />
Transient<br />
0 80.00<br />
V(out1)+V(out2) [mV]<br />
70.00<br />
60.00<br />
50.00<br />
40.00<br />
30.00<br />
20.00<br />
10.00<br />
-0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
-80.00<br />
-90.00<br />
With CMNF<br />
-100.00<br />
0.00 50.00 100.00 150.00 200.00 250.00<br />
Time [ns]
80.00<br />
Orig<strong>in</strong>al Board<br />
60.00<br />
Ansoft Corporation Common Noise<br />
<strong>LVDS</strong> with PRBS measurements<br />
VcomIn [mV]<br />
Ansoft Corporation Common Noise<br />
<strong>LVDS</strong> with PRBS measurements with beads<br />
100.00<br />
Curve Inf o<br />
VcomIn<br />
Transient<br />
Ferrite 50.00 Beads+Orig<strong>in</strong>al Board<br />
VcomIn [mV]<br />
Vcom [mV]<br />
40.00<br />
20.00<br />
0.00<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
0.00 50.00 100.00<br />
Time [ns]<br />
150.00 200.00 250.00<br />
0.00<br />
-50.00<br />
10.00<br />
0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
Curve Inf o<br />
VcomIn<br />
Transient<br />
-80.00<br />
0.00 50.00 100.00<br />
Time [ns]<br />
150.00 200.00 250.00<br />
Ansoft Corporation XY Plot 4<br />
<strong>LVDS</strong> with PRBS new system<br />
100.00<br />
Curve Inf o<br />
90.00<br />
V(<strong>in</strong>1)+V(<strong>in</strong>2)<br />
Transient<br />
80.00 CMNF+Modified 70.00 FPC/VIDEO<br />
60.00<br />
V(<strong>in</strong>1)+V(<strong>in</strong>2) [mV]<br />
50.00<br />
40.00<br />
30.00<br />
20.00<br />
10.00<br />
-0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
-80.00<br />
-90.00<br />
-100.00<br />
0.00 50.00 100.00 150.00 200.00 250.00<br />
Time [ns]<br />
Ansoft Corporation Common Noise<br />
<strong>LVDS</strong> with PRBS measurements<br />
100.00<br />
Curve Info<br />
Vcom [mV]<br />
Ansoft Corporation XY Plot 1<br />
<strong>LVDS</strong> with PRBS measurements with beads<br />
100.00<br />
Curve Inf o<br />
Vcom [mV]<br />
80.00<br />
60.00<br />
40.00<br />
20.00<br />
-0.00<br />
-20.00<br />
-40.00<br />
-60.00<br />
-80.00<br />
-100.00<br />
0.00 0.50 1.00<br />
Time [us]<br />
1.50 2.00<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
-2.00<br />
-100.00<br />
-100.00<br />
0.00 50.00 100.00 150.00 200.00 250.00<br />
0.00 50.00 100.00 150.00 200.00<br />
0.00 50.00 100.00 150.00 200.00 250.00<br />
Time [ns]<br />
Time [ns]<br />
Time [ns]<br />
Can achieve Much Quality EYE pattern with<br />
250.00<br />
Ansoft Corporation<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
Common Noise<br />
<strong>LVDS</strong> with PRBS new system<br />
Ansoft Corporation Ansoft Corporation Common Noise<br />
Eye<br />
<strong>LVDS</strong> with PRBS new system<br />
Curve Inf o<br />
100.00<br />
2.00<br />
Curve Info<br />
Vcom<br />
90.00<br />
Transient<br />
Vdiff<br />
Transient<br />
1.50<br />
80.00<br />
70.00<br />
1.00<br />
60.00<br />
Lower Common Mode Degeneration!!<br />
<strong>LVDS</strong> with PRBS new system<br />
Curve Info<br />
Vcom<br />
Transient<br />
40.00<br />
50.00<br />
0.50<br />
30.00<br />
40.00<br />
0.00<br />
30.00<br />
20.00<br />
20.00<br />
Modified FPC/VIDEO<br />
Ansoft Corporation Eye<br />
<strong>LVDS</strong> with PRBS measurements<br />
2.00<br />
Curve Inf o<br />
Vdiff [V]<br />
-2.00<br />
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00<br />
Time [ns]<br />
2.00<br />
Vdiff [V]<br />
Ansoft Corporation Eye<br />
<strong>LVDS</strong> with PRBS measurements with beads<br />
2.00<br />
Curve Inf o<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
-2.00<br />
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00<br />
Time [ns]<br />
2.00<br />
Vdiff [V]<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
Vdiff<br />
Transient<br />
-2.00<br />
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00<br />
Time [ns]<br />
2.00<br />
Vdiff [V]<br />
-0.50<br />
-1.00<br />
-1.50<br />
-2.00<br />
0.00 0.50 1.00 1.50 2.00<br />
Time [us]<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
-2.00<br />
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00<br />
Time [ns]<br />
2.00<br />
Vdiff [V]<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
1.50<br />
1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
Vdiff<br />
Transient<br />
-2.00<br />
0.00 0.50 1.00 1.50 2.00<br />
Time [us]<br />
Ansoft Corporation Eye<br />
<strong>LVDS</strong> with PRBS new system<br />
2.00<br />
Curve Inf o<br />
Vdiff<br />
Transient<br />
-2.00<br />
0.00 50.00 100.00 150.00 200.00 250.00<br />
Time [ns]<br />
Vcom [mV]<br />
V(out1)+V(out2) [mV]<br />
50.00<br />
0.00<br />
-50.00<br />
10.00<br />
-0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
-80.00<br />
-90.00<br />
Vcom<br />
Transient<br />
Vcom<br />
Transient<br />
-100.00<br />
0.00 0.50 1.00<br />
Time [us]<br />
1.50 2.00<br />
Ansoft Corporation XY Plot 3<br />
<strong>LVDS</strong> with PRBS new system<br />
100.00<br />
Curve Info<br />
90.00<br />
80.00<br />
70.00<br />
60.00<br />
50.00<br />
40.00<br />
30.00<br />
20.00<br />
10.00<br />
-0.00<br />
-10.00<br />
-20.00<br />
-30.00<br />
-40.00<br />
-50.00<br />
-60.00<br />
-70.00<br />
-80.00<br />
-90.00<br />
V(out1)+V(out2)<br />
Transient<br />
-100.00<br />
0.00 50.00 100.00 150.00 200.00 250.00<br />
Time [ns]
Us<strong>in</strong>g Scc21 and <strong>EMI</strong>?<br />
Panasonic<br />
Mode Transformer<br />
100 Ohm 100 Ohm<br />
Diff2<br />
D1 Diff1<br />
D2<br />
Common1<br />
Common2<br />
C1 C2<br />
25 Ohm 25 Ohm<br />
S-parameter<br />
n3<br />
n1<br />
EXC24CE900<br />
Ansoft Corporation <strong>LVDS</strong> Scc 1 CMNF<br />
0.00<br />
Y1<br />
-5.00<br />
-10.00<br />
-15.00<br />
-20.00<br />
-25.00<br />
-30.00<br />
-35.00<br />
-40.00<br />
-45.00<br />
-50.00<br />
1<br />
2<br />
XY Plot 2<br />
0.00 0.00 0.01 0.10 1.00<br />
F [GHz]<br />
ref<br />
dB(S(C1,C2))<br />
L<strong>in</strong>earFrequency<br />
dB(S(C2,C1))<br />
L<strong>in</strong>earFrequency<br />
dB(S(C2,C2))<br />
L<strong>in</strong>earFrequency<br />
0<br />
3<br />
4<br />
n2<br />
n4<br />
-40.00<br />
-45.00<br />
-50.00<br />
Panasonic<br />
Mode Transformer<br />
100 Ohm 100 Ohm<br />
Diff2<br />
D1 Diff1<br />
D2<br />
Common2<br />
Common1<br />
C1 C2<br />
25 Ohm 25 Ohm<br />
S-parameter<br />
-20.00<br />
We are currently evaluat<strong>in</strong>g the theory and measurements <strong>in</strong> correlate<br />
Curve Info<br />
-25.00<br />
dB(S(C1,C1))<br />
L<strong>in</strong>earFrequency<br />
the Scc21 and <strong>EMI</strong> measurements.<br />
-5.00<br />
-10.00<br />
-15.00<br />
n3<br />
n1<br />
EXC24CE900<br />
1<br />
2<br />
ref<br />
0<br />
3<br />
4<br />
EXC24CE900<br />
Ansoft Corporation<br />
0.00<br />
XY Plot 2<br />
<strong>LVDS</strong> Scc 2 CMNF<br />
dB(S(C1,C2))<br />
-30.00<br />
L<strong>in</strong>earFrequency<br />
dB(S(C2,C1))<br />
Qualitatively we observed if Scc21 is small, it will make L<strong>in</strong>earFrequency the <strong>EMI</strong> small.<br />
-35.00<br />
Curve Info<br />
dB(S(C2,C2))<br />
dB(S(C1,C1))<br />
L<strong>in</strong>earFrequency<br />
L<strong>in</strong>earFrequency<br />
Y1<br />
0.00 0.00 0.01 0.10 1.00<br />
F [GHz]<br />
n2<br />
n4
Measurement on <strong>EMI</strong><br />
OLD VIDEO BOARD+FPC-A<br />
NEW VIDEO BOARD+FPC-B<br />
+ CMNF on TILT Board<br />
FPC+Board<br />
FPC + Video Board suppress<br />
Noise around 100MHz-180MHz<br />
By suppress<strong>in</strong>g the common mode degeneration, we have suppressed the <strong>EMI</strong><br />
Noise. Confirmed on the LAB.<br />
CMNF
Design<strong>in</strong>g quality signal l<strong>in</strong>e<br />
with Less Common Mode<br />
Degeneration<br />
• Impedance match<strong>in</strong>g (either from frequency doma<strong>in</strong> and TDR) will<br />
result <strong>in</strong> keep<strong>in</strong>g the quality signal through out the system.<br />
• Skew Reduction through out the System will reduce Common<br />
Mode Degeneration.<br />
• CMNF achieves additional reduction of the Common Mode Noise.<br />
• <strong>EMI</strong> measurements are done by Panasonic and new<br />
Board+FPC+CMNF reduced all the unnecessary noise from the<br />
system.<br />
• New System ma<strong>in</strong>ta<strong>in</strong> good Eye Pattern and Low <strong>EMI</strong>.<br />
• Electromagnetic Simula<strong>to</strong>r <strong>to</strong>gether with Accurate Circuit<br />
Simula<strong>to</strong>r are the key of p<strong>in</strong> po<strong>in</strong>t<strong>in</strong>g the cause of the problems
Acknowledgements<br />
• We like <strong>to</strong> express deep acknowledgements <strong>to</strong><br />
Mr. Higashtiani (PED) for provid<strong>in</strong>g all the<br />
precious data <strong>to</strong> confirm on the Measurements<br />
and Simulation comparison.<br />
• Mr. Kihara and Mr. Su<strong>to</strong> (PCC) for provid<strong>in</strong>g us<br />
pro<strong>to</strong>type board as well as new board. Also all<br />
the effort of mak<strong>in</strong>g <strong>EMI</strong> measurements.<br />
• Mr. Noda (Molex Japan) for provid<strong>in</strong>g us the<br />
connec<strong>to</strong>r models and S-parameters with helpful<br />
discussions.
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