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Find the correct equation for common-mode rejection ratio

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in Linear Integrated Circuits by (37.1k points)
Find the correct equation for common-mode rejection ratio

(a) CMRR = 20log(AD/ ACM)

(b) CMRR = 20log(Vio/ VCM)

(c) CMRR = (AD* VCM)/ VOCM

(d) All of the mentioned

I have been asked this question in my homework.

This interesting question is from Common Mode Configuration and  Rejection Ratio topic in section Practical Limitations of Op Amp Circuits of Linear Integrated Circuits

1 Answer

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by (39.8k points)
The accurate answer is (d) All of the mentioned

In simpler terms: Generally, the CMRR value is very large and usually specified in decibels (db). Also, the CMRR value can establish relationship with common mode output voltage.

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