what circuits can simulate these parameters of a full OPA?

[wjxcom]

Hi, all:
I do not know how to design circuits to simulate these parameters of a full differential OPA such as DC character, AC character, TRAN character, CMRR, PSRR, ICMR? At the same time, the OPA is a full differential OPA whose CMFB is switched capacitor circuits.

Help me, Please!!!!

 

[wjxcom]

Re: what circuits can simulate these parameters of a full OP

Hi, all: when I simulate the DC character, AC character, TRAN character, CMRR, PSRR, ICMR( the OPA is a full differential OPA whose CMFB is switched capacitor circuits), I get rid of the CMFB circuit, i.e. switched capacitor circuits, and I add a DC voltage to the cmfb, I do not know what I do is right or not.

the attachment file ed_OPA_1st.pdf is the full differential OPA, and the opa.pdf is the circuit that I simulate the DC character, AC character, TRAN character, CMRR, PSRR, ICMR of this circuit.

regards!!

 

[paulux]

Re: what circuits can simulate these parameters of a full OP

yes, you can set the dc bias voltage to bias the transistors. That's good.

 

[montage2000]

principle is the same, the most important thing is to set correct bias and loading

 

[beckchm]

Re: what circuits can simulate these parameters of a full OP

it is too simple !