hi
when i simulated the ota in the picture
sometimes i found the gain was very low
it was about 30dB
even the gain at the output(the second stage) was samller than the first stage
Can anybody tell me why this happenned?
thank you.
Typical gain for such circuit is more 100dB (process > 0.5um). So at the first you need to check that each MOSTs operate in saturation. Also check CMFB circuit. I hope u don't forget include CMFB in simulation.
hi
when i simulated the ota in the picture
sometimes i found the gain was very low
it was about 30dB
even the gain at the output(the second stage) was samller than the first stage
Can anybody tell me why this happenned?
thank you.