What is CMRR (common-mode rejection ratio)?
The ratio of differential gain to common-mode gain in a differential amplifier. The larger it is, the better the circuit rejects noise that appears equally on both inputs.
CMRR (common-mode rejection ratio) in the explanations
CMRR is the ratio of differential to common-mode gain, typically 80–120 dB for op-amps.
What does a large CMRR (common-mode rejection ratio) of a d…The ratio of differential to common-mode gain is the CMRR (common-mode rejection ratio).
What does a differential pair, with the emitters of two tra…An instrumentation amplifier uses two input op-amps for high input impedance and gain and a third differential stage to reject common-mode signals, with CMRR that can exceed 100 dB.
Which amplifier, typically built from three op-amps, is use…
Questions that mention CMRR (common-mode rejection ratio) (3)
- What does a large CMRR (common-mode rejection ratio) of a differential amplifier mean?
- What does a differential pair, with the emitters of two transistors connected to a common current source, do?
- Which amplifier, typically built from three op-amps, is used to amplify tiny differential signals from sensors with high precision?
Related terms
Differential amplifier Tail current Operational amplifier (op-amp) Instrumentation amplifier 1/f noise (flicker noise) Bandgap voltage reference Comparator Cutoff frequency Gain-bandwidth product (GBW) LDO