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What is CMRR? Explain briefly.
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Answer Posted / raj
it is the measure of how good is your opamp to kickoff the
common mode devil called noise as the noise happens to be
the commom mode signal.To do so in the first stage of an
opamp,the differential amplifier is designed properly to
decrease common mode gain ,hense improving CMRR.
HOW?...emitter resistor replaced with current mirror
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