HeavyDesign wrote on Nov 19th, 2012, 1:24am:Hi Guys,
I'm working on a fully differential amplifier with his CMFB and I have some issues to simulate his AC gain. Is anybody has an idea how to simulate the gain of the amplifier and the gain of the CMFB. There is 2 loops in 1 loop and I didn't find any books/documents talking about how to do. I have the feeling that it's like a grandma recipe! no one wants to share it.
Anyway, Thanks for ur help...
From your description I don`t know which gains you are interested in:
* AC gain of the whole amplifier?
* Loop gain of the amplifier (you speak about 2 loops)? Whic loops?
* What is "gain of the CMFB"? Gain of the CMFB loop or the feedback block only?
The best idea would be to show us the circuit diagram.