T09 OTA_sss.pdf - bSpace
T09 OTA_sss.pdf - bSpace
T09 OTA_sss.pdf - bSpace
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F C L,eff =<br />
FV<br />
i 2 gmR E<br />
on + Ī2 n,R E<br />
|<br />
| 2 Noise<br />
s<br />
2<br />
1+gmRg E m,1 =2πC L,eff N log (2) C L,eff<br />
F<br />
Phase 1:<br />
ī 2 1<br />
on = Ī2 nc |<br />
| 2 +i 2 gmR E<br />
¯V C 2 s<br />
= KT<br />
on +<br />
1+gmR Ī2 n,R E<br />
|<br />
| 2<br />
E 1+gmR E<br />
n F 1 Noise factor of driving amplifier<br />
C s<br />
¯V C 2 f<br />
= KT n F 2<br />
C f<br />
¯V Noise<br />
C 2 s<br />
= KT factor n F 1 of this amplifier<br />
T n F 2<br />
+ KT<br />
C s<br />
1<br />
C f<br />
Phase C L,eff<br />
2: F n F 2<br />
¯V C 2 f<br />
= KT<br />
C f<br />
C f<br />
F =<br />
C<br />
¯V on 2<br />
f +<br />
=( C s<br />
C s C+ )<br />
f<br />
Ci<br />
2 2 ¯V Cs<br />
+ KT + KT 1<br />
C f C L,eff F n F 2<br />
F =<br />
C f<br />
C f + C s + C i<br />
EECS 240 Topic 9: <strong>OTA</strong><br />
© 2007 B. Boser & A. Niknejad
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