Here I have an importnat question, can I consider the differential ampliifer as two inverting amplifier (the first inverter on the vin+ and the other on vin-),
why this should be important ?
because we know that inverting ampliifer is not suffering fron input common mode voltage variation, thus generally the inverting amplifier are preferable in case to obtain high CMRR.
if the fully differential amplifier is a composition of equivelant two inverting amplifier then it should also has the same charasterictics of the inverting amplifier regarding the CMRR
Thanks