[moved] MOSFET as resistor CMFB Circuit

[ibjrls]

Hello. Just a quick question. This is a folded cascode fully differential amplifier with a MOS as resistor CMFB. This uses an NMOS input pair topology. How should I configure it if my input pairs are PMOS? Would appreciate any feedback, no pun intended. Thank you

 

[arthorios]

The configuration is very similar to the NMOS input pair you show, but now you have the MOS resistors (implemented with PMOS) between the source of the PMOS tail transistor and VDD.