Question
Download Solution PDFThe ratio between differential gain and common-mode gain is called:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCMRR (Common mode rejection ratio) is defined as the ratio of differential-mode voltage gain (Ad) and the common-mode voltage gain (Ac).
Mathematically, this is expressed as:
\(CMRR = \frac{A_d}{A_c}\)
Ad = Differential gain
Ac = Common mode gain
Note: Ideally, the common-mode gain of the Op--Amp should be zero., i.e. it must give a zero output for common input at both the inverting and non-inverting terminal. ∴ The CMRR of an ideal Op-Amp is infinity.
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