Problem with DC value in fully opamp simulation

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shanmei

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when I simulate a fully opm with cmfb, the DC value dose not equal to the trans value, for example, when the DC value show 2.3v for a line, but the trans value equal to 3 , anyone knwo the reason?
Pls! thanks!
 

DC value problem?

which kind of cmfb do you use? SC or continuous
 

Re: DC value problem?

shanmei said:
when I simulate a fully opm with cmfb, the DC value dose not equal to the trans value, for example, when the DC value show 2.3v for a line, but the trans value equal to 3 , anyone knwo the reason?
Pls! thanks!
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do you want to use resistances to obtain a small gain with a fully opa?
 

Re: DC value problem?

DC value is not equal to transient result, DC value is the final transient response result. Consider RC delay.
 

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