simon0123
Newbie level 6
I have draw a folded cascode opamp and I want to simulate it open loop gain and phase.
The way that I used to simulate an opamp is to connect a AC source to the non-inverting input and connect a 1F capacitor to inverting input. Also connect a 1G resistor between output and inverting input. (P.S for the AC source, I just use a VDC source and set DC voltage =0V and AC magnitude = 1V)
However, I can't get the expected results. Please help me to point out the problems of my circuit. The gain is very low and the waveform is not correct. Thanks a lot
(P.S to way that i plot the result is just click Results -> Direct plots -> AC magnitude and phase.)
Is it my simulation setting is wrong??
The way that I used to simulate an opamp is to connect a AC source to the non-inverting input and connect a 1F capacitor to inverting input. Also connect a 1G resistor between output and inverting input. (P.S for the AC source, I just use a VDC source and set DC voltage =0V and AC magnitude = 1V)
However, I can't get the expected results. Please help me to point out the problems of my circuit. The gain is very low and the waveform is not correct. Thanks a lot
(P.S to way that i plot the result is just click Results -> Direct plots -> AC magnitude and phase.)
Is it my simulation setting is wrong??