Answer / nidhi ahmed

The common-mode rejection ratio of a differential amplifier
(or other device) measures the tendency of the device to
reject input signals common to both input. A high CMRR is
important in applications where the signal of interest is
represented by a small voltage fluctuation superimposed on a
voltage offset, or when relevant information is contained in
the voltage difference between two signals. (example-audio
transmission over balanced lines.)
The CMRR is a very important specification, as it indicates
how much of the common-mode signal will appear in your
measurement. The value of the CMRR often depends on signal
frequency.
CMRR is often important in reducing noise on transmission
lines.The CMRR of the measurement instrument determines the
attenuation applied to the offset or noise.
Mathematically,
"It is the ratio b/w diffferitial gain to common mode gain"

Answer / sony

common mode rejection ratio

it is the ratio b/w diffferitial gain to common mode gain

Answer / daniel joel

CMRR(common mode
rejection ratio) is the ratio of
differential mode gain to the
common mode gain. Actually
in differential amplifier it
should amplify the difference
of the two input signals and
reject the common signals
applied at both ends. CMRR
indicates the efficiancy of the
differential amplifier. Ideally
the CMRR value must be
infinite

Answer / padma

Common Mode Rejection Ratio.
it is used to reduce signal to noise ratio

Answer / chandu

CMRR --IT IS THE RATIO TO THE COMMON MODE GAIN TO THE
DIFFERIENTIAL GAIN........

Could somone help to get the detailed notes for telecom testing.please contact me on ani.bhardwaj@rediffmail.com

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