Question
Download Solution PDFFor an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCMRR:.
Common Mode Rejection Ratio (CMRR) is defined as the ratio of differential-mode gain to common-mode gain taken in magnitude
CMRR stands for Common Mode Rejection Ratio It is the ability of an operational amplifier to reject the common-mode signals at the input terminals
Mathematically, this is expressed as:
\(CMRR = \frac{A_v}{A_c}\)
Av = Differential gain
Ac = Common mode gain
For practical operational amplimers, The Common Mode Rejection Ratio (CMMR) should be 80 to 100 dB.
For Ideal operational amplimers, The Common Mode Rejection Ratio (CMMR) should be infinity.
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