Dear all,
I want to ask a question about simulation of SC-CMFB. I had read the previous post about the same topic, but i still have a problem. Hope anyone can help me, thanks.
I have designed a folded cascode OTA. I have simulated its Gain and Bandwidth without CMFB. The gain is 80dB.
When i simulate it with a SC-CMFB by pss and pac, the gain become 60dB and similar Bandwidth.
I observe the pss trans. waveform is OK. Then, i wonder the loss of gain is due to the CMFB or wrong simulation setting or other reasons.
Please give me some suggestion!
Best Regards,
George