Lect. 24: High-Frequency Response of MOSFET CS
Lect. 24: High-Frequency Response of MOSFET CS
Lect. 24: High-Frequency Response of MOSFET CS
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<strong>Lect</strong>. <strong>24</strong>: <strong>High</strong>-<strong>Frequency</strong> <strong>Response</strong> <strong>of</strong> <strong>MOSFET</strong> <strong>CS</strong><br />
It can be shown from an exact (but complicated ) analysis that<br />
'<br />
V<br />
−( g ) ( )<br />
mR ⎡<br />
L<br />
1 −s Cgd / g ⎤<br />
m<br />
o<br />
=<br />
⎣<br />
⎦<br />
Vsig<br />
1+ s{ ⎡C C ( 1 g R ) ⎤R ( C C ) R } s ⎡( C C ) C C C ⎤<br />
⎣<br />
+ +<br />
⎦<br />
+ + +<br />
⎣<br />
+ +<br />
⎦<br />
R R<br />
' ' 2 '<br />
gs gd m L sig L gd L L gd gs L gd sig L<br />
Too complex. A simpler way <strong>of</strong> estimating f H , high-frequency 3-dB frequency?<br />
Electronic Circuits 1 (09/2)<br />
Pr<strong>of</strong>. Woo-Young Choi
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