How to bias this differential circuit correctly ?
Vdd = 3.3V and This differential circuit is connected in negative feedback manner to a CMOS inverter.
Note: this is not homework question. I am a self-learner and whatever useful replies I get will be used to debug https://github.com/promach/frequency_trap
Edit for clarification It seems like I have a similar differential amplifier as in Figure 4.54(a) below:
Why does the first term of A1 ends up as Ad while the second term ends up as Acm ?
Is the following test circuit the right way to measure open-loop gain of my Gm2 circuit block ? note: now I have asymmetrical input rather than symmtrical differential pair