Voltage References

Video Circuits (continued)
Advanced NTSC Comb Filter
MC141621FB Case 898
The MC141621 is an advanced NTSC comb filter for VCR
and TV applications. It separates the luminance (Y) and chrominance
(C) signals from the NTSC composite video signal
by using digital signal processing techniques. This filter allows
a video signal input of an extended frequency bandwidth
by using a 4.0 FSC clock. In addition, the filter minimizes dot
crawl and cross color effects. The built-in NO and O/A converters
allow easy connections to analog video circuits.
Ibias 39
Yout
REF(OA)
Cout
VCC(AO) = PIN 25
VCC(O) = PIN 11
VCCIOA) = PIN 42
GNO AD) = PIN 26
GNO(O) = PINS 9, 19
GNO(OA) = PIN 43
Ibias
• Built-in High Speed 8-Bit NO Converter
• Two line Memories (1820 Bytes)
• Advanced Combing Process
• Two 8-Bit O/A Converters
• Built-in Clamp Circuit
• On-Chip Reference Voltage Regulator for AOC
• Oigitallnterface Mode
CO C1 C2 C3 C4 C5 C6 C7 RTP
Control
Logic
13
DO 01 02 03 04 05 06 07 BW Clk
MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA
9-21
28
AOC
RTPS
27
Self
Bias
23
22
21
20
Clamp 18
17
16
RBTS
RBT
Vin
Clout
CLC
TE1
TEO
Mode 1
Mode 0