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A question about input bias for a fully differential amplifier

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keisini5577

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I have a question about the input bias for a fully differential amplifier. As showed in attached file. 1.jpg

There I have a single-ended input signal at the port Vin+, how can I creat the DC bias for another input Vin- from the positive output? Thank you!
 

For fully differential amplifier, common-mode feedback is used to decide DC output operating voltage. DC voltage of input should be decided by your input signal.
 

leo_o2 said:
For fully differential amplifier, common-mode feedback is used to decide DC output operating voltage. DC voltage of input should be decided by your input signal.
Click to expand...

Is it possible if I want to creat DC bias from the output for Vin-? For example, if the DC voltage in port Vin+ is unknown, how can I bias another input port? As I know, that the DC bias in Vin+ and Vin- should be the same. Is it?
 

Is there someone could help me? Thanks~
 

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