in differential amplifier to single ended

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Ac gain and DC gain are same upto some frquencies...............DC gain is gain @ DC......and AC gain is gain at different freq (generally increase or drop depends on pole and zero's of system)
 

the ac gain is function of frequency (and the operating point), its value at f=0 is the dc gain... what am I missing?

to calculate the gain of a standalone differential amplifier use ac analysis, stimulate the input with an ac source around its DC operating point and calculate the expression
vout/(vplus-vminus), if you just need an estimate the ratio of input transconductance to output admittance gives you the dc gain
 

thanks to all.

@dgnani
i cant understand what did u said?

---------- Post added at 12:53 ---------- Previous post was at 12:47 ----------

in a differential amplifier how to make constant gain?

Gain is varying whenever CMR changes?
 

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