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fully differential amp

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firsttimedesigning

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how do i test the gain of fully differentail amp? can anyone show me some schematics?
 

firsttimedesigning said:
how do i test the gain of fully differentail amp? can anyone show me some schematics?
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the following attached file can help you

Added after 35 seconds:

why can not upload file?
 

Amp is open loop. Add a small signal sin between in+ and in-, and do ac analysis.
 

you only want to test the DC gain? you can do the ac simulation accurately, pls refer to paper"determination of stability using return ratios in balanced fully differential feedback circuits"
 

firsttimedesigning said:
how do i test the gain of fully differentail amp? can anyone show me some schematics?
Click to expand...

sometimes you can test it in close loop
 

You can run .dc with sweep vip or vin.
 

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