[SOLVED] Cmfb

[Mohammedkhalid]

Hi,

I want to design a fully differential amplifiers to get the gain of 80db, to control the output nodes I need to use cmfb. But in cmd block resistors will be there which limits the gain. Can anyone how can I achieve 80db gain?

 

[ahsrabrifat]

A telescopic cascode amplifier can provide very high gain (~80 dB) by increasing the output impedance. A folded cascode topology can be used if you require higher voltage swings. Adding gain-boosted cascode transistors will further enhance the output resistance and thus the gain.

 

[Mohammedkhalid]

Ok, thanks but my question is related to cmfb.