In the transconductor of Fig XXXXXXXXXXb), find the minimum collector voltages of such that they remain in the active region for around a common-mode voltage of . Repeat for the transconductor of Fig...

In the transconductor of Fig. 12.12(b), find the minimum collector voltages of such that they remain in the active region for around a common-mode voltage of . Repeat for the transconductor of Fig. 12.13 where and are replaced by bipolar transistors.