Why is the CMRR of an inverting amplifier always lower than

Why is the CMRR of an inverting amplifier always lower than that of its op-amp? a. The common-mode gain of an op-amp increases when it is used in an inverting amplifier. b. The value of differential gain for an inverting amplifier is lower than that of its op-amp. c. Slew-rate limiting decreases the common-mode gain of the op-amp. d. Because of the lower input impedance of the inverting amplifier.

Solution

Ans is b.

The value of differntial gain for an inverting amplifier is lower than that of its op-amp