Re: cmfb consideration
Hi Jem,
If you are looking on the further explanations on the CMFB design, im not sure whether you have read Razavi's CMOS Design book. If you haven't gone through the book, there is a sub chapter on CMFB design, so you can have look on that. Generally, in designing the CMFB circuit, one must design it to have a large gain, thus the offset voltage will be lesser when it comes for voltge detection at 2 points, so the CMFB output will compensate that voltage accordingly, thus the Common mode DC voltage is kept constant. I will see if i have any other good notes on CMFB design, then i will send you.
It will be very nice if other experience people can give feedback on the post about the queries on gain, step response and so on.
Thanks,
Suria