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Internal Components of Op-Amps
hard

In a non-inverting amplifier configuration using an operational amplifier, how does the common-mode rejection ratio (CMRR) influence the performance of a voltage follower circuit?

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A

A higher CMRR allows the voltage follower to accurately replicate the input voltage while minimizing the effect of common-mode signals.

B

A lower CMRR increases the output voltage beyond the input voltage in a voltage follower.

C

CMRR does not affect the performance of a voltage follower since it only operates in a non-inverting configuration.

D

The CMRR directly determines the gain of the voltage follower in a non-inverting amplifier.

Understanding the Answer

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CMRR tells the op amp how well it can ignore signals that are common to both inputs. Other options are incorrect because Low CMRR does not make the output higher than the input; Even though a follower is a non‑inverting circuit, it still sees common‑mode voltage.

Key Concepts

common-mode rejection ratio
voltage follower
non-inverting amplifier
Topic

Internal Components of Op-Amps

Difficulty

hard level question

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Definition
Definition

Op-amps consist of multiple transistors that enable amplification and signal processing. The number of transistors varies by model, with typical op-amps containing several transistors to achieve the desired operational characteristics.

Topic Definition

Op-amps consist of multiple transistors that enable amplification and signal processing. The number of transistors varies by model, with typical op-amps containing several transistors to achieve the desired operational characteristics.

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