What conditions are needed for common mode feedback?

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sjyatou

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common mode feedback

for common mode feedback circuit stability ,need what conditions ,how to
tune the circuit to satisfy the conditions
thank you very much ,I am a tenderfoot for here ,wish help each others.
 

you should simulation the phase margin of CMFB circuit, commonly saying, Phase margin>60 degree
 

sinianfriend said:
you should simulation the phase margin of CMFB circuit, commonly saying, Phase margin>60 degree
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if phase margin <60,wether the circuit must be unstable,can you detail
the defination about phase margin.

thank you!
 

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