In an op- amp, the CMRR is limited mostly by the
A)gain- bandwidth product.
B)the common- mode gain of the op- amp.
C)tolerance of the resistors.
D)supply voltages.

Question

Quizplus · Accepted Answer

The Common-Mode Rejection Ratio (CMRR) of an operational amplifier (op-amp) is primarily limited by the common-mode gain of the op-amp. CMRR is a measure of how well the op-amp can reject input signals that are common to both input terminals, and it is ideally infinite in a perfect op-amp. However, imperfections in the op-amp's internal components, such as mismatches in transistor pairs, lead to a finite common-mode gain, which in turn limits the CMRR.

In an Op- Amp, the CMRR Is Limited Mostly by the