joehwang
Junior Member level 2
Hi, I got some questions about the bandgap reference:
1. what is gm-based reference? Is it constant-gm biasing?
2. In the fig.1, why the output of the op-amp (node P) can adjust the gate voltage of the PMOS devices so as to "Equalize" Vx = Vy?
3. Also in the fig.1, what will happen if I change the input polarity of the op-amp? Does the polarity matter with the stable issue?
Thanks!
Wang
1. what is gm-based reference? Is it constant-gm biasing?
2. In the fig.1, why the output of the op-amp (node P) can adjust the gate voltage of the PMOS devices so as to "Equalize" Vx = Vy?
3. Also in the fig.1, what will happen if I change the input polarity of the op-amp? Does the polarity matter with the stable issue?
Thanks!
Wang