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common-mode rejection ratio

   Also found in: Wikipedia 0.01 sec.
common-mode rejection ratio [′käm·ən ‚mōd ri′jek·shən ′rā·shō]
(electronics)
The ratio of the gain of an amplifier for difference signals between the input terminals, to the gain for the average or common-mode signal component. Abbreviated CMRR.


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A high common-mode rejection ratio improves the distortion performance of an amplifier when used in a non-inverting feedback configuration, which is the standard topology for most power amps.
A high common-mode rejection ratio (CMRR) of 86 dB (gain=5) effectively eliminates common-mode interference.
The Ampzilla 2000 uses two stages of differential voltage amplification, instead of a single stage, to enhance the common-mode rejection ratio.
 
 
 
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