Why Is the CMRR of an Inverting Amplifier Always Lower

question 14

Multiple Choice

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.

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