common mode rejection ratio

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common mode rejection ratio

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CMRR

The ability of an amplifier to amplify a signal in the presence of electrical noise. The higher the number, the better the amplification.
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References in periodicals archive ?
The advantages of employing chopper stabilization for the implementation of IAs are high CMRR, high accuracy, low drift, suppression of low-frequency noise with low signal aliasing and can achieve rail-to-rail input operation [14].
In the proposed scheme, the implementation requires matched resistor pair; however, it is shown that high CMRR can be achieved by 1 % matching ratio of the resistors.
Supply voltage Gain PM GM BW 1.8 V 103 dB 49[degrees] 11.46 dB 12.4 KHz degree Supply voltage SR [ICMR.sup.-] [ICMR.sup.+] CMRR 1.8 V 151.50 V/ 71.45 mV 1.60 mV 71.27 dB [micro]S Supply voltage [PSRR.sup.+] [PSRR.sup.-] Offset Pd 1.8 V 73.60 dB 81.75 dB 11.30 mV 316.24 [micro]W Table 2: Performance summary of the comparator.
The device has a common-mode rejection ratio (CMRR) >80 dB, with sampling frequency configured at 2000 Hz and the signal was filtered between 20 and 500 Hz.
Though this topology can achieve common-mode rejection (CMRR) above 80 dB at DC, the CMRR dramatically degrades as frequency increases.
To achieve this, we used a INA128 biomedical instrumentation amplifier manufactured from Texas Instruments[R], which has a CMRR of 120 dB, necessary to acquire such signals.
(b) With sinusoid signals, 20 dB/decade frequency roll-off had been observed at 3.3 MHz onwards; measured CMRR [approximately equal to] 57 dB at [V.sub.2] = [-V.sub.1]
(1) Service of Neurology and CMRR, Neuropsychology Unit, University Hospital of Strasbourg, 1 avenue Moliere, 67000 Strasbourg, France
He retired in July 2006 to become director of cmrr. He received a bachelor's degree from SHSU in criminology and corrections and his Master of Public Administration with a criminal justice concentration from Texas A&M Corpus Christi.