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cmfb voltage that is to be fed to the first stage

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ncj

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while dseigning,an op-amp,how to decide the cmfb voltage that is to be fed to the first stage of the op-amp?
 

while dseigning,an op-amp,how to decide the cmfb voltage that is to be fed to the first stage of the op-amp?

The cmfb control voltage should be able to keep the output voltage of the op-amp within an acceptable output range, i.e. more or less in the center of the available output voltage range.
 
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    ncj

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thank you...
 

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