What is the common mode rejection ratio?
Understand the Problem
The question is asking for the definition or explanation of the common mode rejection ratio, which is a concept in electronics and signal processing that measures how well a system can reject input signals that are common to both input terminals. This involves understanding its significance, calculation, and application in various electrical circuits.
Answer
The ratio of differential gain to common-mode gain of the amplifier stage.
The final answer is the ratio of differential gain to common-mode gain of the amplifier stage.
Answer for screen readers
The final answer is the ratio of differential gain to common-mode gain of the amplifier stage.
More Information
CMRR is essential in operational amplifiers for minimizing the effect of noise and interference that appears on both input leads simultaneously. The higher the CMRR, the better the amplifier can reject unwanted common-mode signals.
Tips
A common mistake is confusing the common-mode rejection ratio with the differential gain directly. Remember that CMRR is a ratio indicating how well the common-mode signals are suppressed relative to differential signals.
Sources
- Common-mode rejection ratio - Wikipedia - en.wikipedia.org
- What is Common-Mode Rejection Ratio in Op-amps? - CircuitBread - circuitbread.com
- Op-amp Common Mode Rejection Ratio (CMRR) - Developer Help - developerhelp.microchip.com
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