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On the measurement of common-mode rejection ratio
IEEE Transactions on Circuits and Systems II: Express Briefs, 2005In this brief, several commonly used measurement configurations for common-mode rejection ratio (CMRR) are analyzed and compared with the definition; their advantages and limitations are also discussed. Finally, an improved measurement setup is proposed to characterize CMRR more accurately according to its definition over wider frequency range.
null Jian Zhou, null Jin Liu
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Common-mode rejection ratio redefined
IEEE Transactions on Instrumentation and Measurement, 1997Redefining the common-mode rejection ratio (CMRR), a set of equations is derived for the common-mode gain and the CMRR of differential amplifiers. The results, which are consistent with practice and simulation, show that an amplifier's CMR may exceed the CMR of the active device(s) by intentional unbalancing of the circuit.
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Differential CRLH Coupled-line Unit Cell with High Common Mode Rejection Ratio
2020 50th European Microwave Conference (EuMC), 2021This paper presents a novel unit cell that has a dual behaviour: balanced composite right/left-handed (CRLH) for the differential mode and bandstop behaviour for the common mode. The unit cell consists of two microstrip coupled lines and a cross-shaped slot in the ground.
Mariam A. Ateyya, Amr M. E. Safwat
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Common-mode rejection ratio in current-mode instrumentation amplifiers
Analog Integrated Circuits and Signal Processing, 1995The current-mode instrumentation amplifier (CMIA) based on op-amp power-supply current sensing offers distinct advantages over conventional architecture designs. The CMIA is studied in detail and the CMRR expression is derived in terms of op-amp and transistor parameters.
W. J. Su, F. J. Lidgey
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Common mode rejection ratio in differential amplifiers
IEEE Transactions on Instrumentation and Measurement, 1991The common mode rejection ratio (CMRR) of a differential amplifier (DA) using a single operational amplifier and an instrumentation amplifier (IA) using three operational amplifiers is analyzed, and the complete equations are derived for the case when op amps have finite differential and common mode gains.
R. Pallas-Areny, J.G. Webster
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Common-mode rejection ratio and the ‘Early-intercept’ voltage
International Journal of Electronics, 1977The improvement in low frequency common-mode rejection that results from the replacement of the tail resistor of a simple BJT differential amplifier by a current source is shown to be related to a recently discussed parameter—the ‘ Early-intercept ’ voltage.
B.L. HART, R. W.J. BARKER
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Common mode rejection ratio for cascaded differential amplifier stages
IEEE Transactions on Instrumentation and Measurement, 1991A simple equation for calculating the total common mode rejection ratio, CMRR/sub T/, for cascaded differential amplifier stages is given, and it is applied to several typical cases in instrumentation circuits. Two factors for each stage, C and D, are defined, and it is shown that, in general, CMRR/sub T/ can be calculated by adding the reciprocals of ...
R. Pallas-Areny, J.G. Webster
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Common-Mode Rejection Ratio-Two Definitions
IEEE Transactions on Biomedical Engineering, 1970Two different definitions of the common-mode rejection ratio for differential amplifiers are not clearly distinguished. These ratios may differ by orders of magnitude. When differential amplifiers are used to minimize common mode interference in bioelectric measurements, these two ratios should be carefully defined and their magnitudes determined ...
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Journal of Electromagnetic Waves and Applications, 2019
In this work, a new balanced band pass filter and its design procedure are proposed. The filter is based on a novel resonator, named LTLC resonator, which consists of two inductors (L), two Transmi...
Jose-Luis Olvera-Cervantes +3 more
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In this work, a new balanced band pass filter and its design procedure are proposed. The filter is based on a novel resonator, named LTLC resonator, which consists of two inductors (L), two Transmi...
Jose-Luis Olvera-Cervantes +3 more
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Increasing common-mode rejection ratio based on the voltage follower
2016 International Siberian Conference on Control and Communications (SIBCON), 2016The paper presents certain procedures oriented towards the decrease of the uncertainty of measuring the small differential signal against a large common-mode signal. The technical implementation of the tracking symmetrical power supply is suggested for the instrumentation amplifier based on the voltage follower that allows increasing the common mode ...
P. Baranov +3 more
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