In an operational amplifier, what does the term 'common-mode rejection ratio' (C

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Question: In an operational amplifier, what does the term \'common-mode rejection ratio\' (CMRR) refer to?

Options:

Correct Answer: The ability to reject common-mode signals

Solution:

Common-mode rejection ratio (CMRR) refers to the ability of an operational amplifier to reject common-mode signals.

In an operational amplifier, what does the term 'common-mode rejection ratio' (CMRR) refer to?

In an operational amplifier, what does the term 'common-mode rejection ratio' (CMRR) refer to?

Step 1: Understand what an operational amplifier (op-amp) is. It is an electronic device used to amplify voltage signals.
Step 2: Learn about common-mode signals. These are signals that are present on both inputs of the op-amp at the same time.
Step 3: Recognize that not all signals are useful. We want the op-amp to amplify only the difference between the two input signals, not the common signals.
Step 4: CMRR measures how well the op-amp can ignore or reject these common-mode signals.
Step 5: A higher CMRR value means the op-amp is better at rejecting unwanted common-mode signals, allowing it to focus on the important difference signal.

Common-Mode Rejection Ratio (CMRR) – CMRR is a measure of an operational amplifier's ability to reject input signals that are common to both the inverting and non-inverting inputs, thereby enhancing the amplifier's ability to amplify only the differential signal.