Quantitative analysis of four EMG amplifiers

E. J. Perreault; I. W. Hunter; R. E. Kearney

doi:10.1016/0141-5425(93)90079-E

Quantitative analysis of four EMG amplifiers

E. J. Perreault, I. W. Hunter, R. E. Kearney^*

^*Corresponding author for this work

Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Four typical EMG amplifiers were tested quantitatively to observe the diversity and specificity of available equipment. Gain, phase, common mode rejection ratio (CMRR) and noise characteristics were measured for each device. Various gain and phase responses were observed, each best suited to specific application areas. For all amplifiers, the CMRR was shown to decrease dramatically in the presence of input impedance mismatches of more than 10 kΩ between the two electrodes. Because such impedance mismatches are common on the skin surface, these results indicate that proper skin preparation is required to maximize the noise rejection capabilities of the tested amplifiers.

Original language	English (US)
Pages (from-to)	413-419
Number of pages	7
Journal	Journal of Biomedical Engineering
Volume	15
Issue number	5
DOIs	https://doi.org/10.1016/0141-5425(93)90079-E
State	Published - Sep 1993

Keywords

EMG signal processing
Electromyography
amplifier
common mode rejection ratio
frequency response
noise measurements

ASJC Scopus subject areas

Biophysics

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10.1016/0141-5425(93)90079-E

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title = "Quantitative analysis of four EMG amplifiers",

abstract = "Four typical EMG amplifiers were tested quantitatively to observe the diversity and specificity of available equipment. Gain, phase, common mode rejection ratio (CMRR) and noise characteristics were measured for each device. Various gain and phase responses were observed, each best suited to specific application areas. For all amplifiers, the CMRR was shown to decrease dramatically in the presence of input impedance mismatches of more than 10 kΩ between the two electrodes. Because such impedance mismatches are common on the skin surface, these results indicate that proper skin preparation is required to maximize the noise rejection capabilities of the tested amplifiers.",

keywords = "EMG signal processing, Electromyography, amplifier, common mode rejection ratio, frequency response, noise measurements",

author = "Perreault, {E. J.} and Hunter, {I. W.} and Kearney, {R. E.}",

note = "Funding Information: This work was su ported by the Medical Research Council of Cana X a and the Natural Sciences and Engineering Research Council of Canada. We would also like to thank Dr Stephen Jacobsen of the University of Utah and his colleagues from Iomed, Inc., for the loan of the Motion Control amplifiers.",

year = "1993",

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doi = "10.1016/0141-5425(93)90079-E",

language = "English (US)",

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pages = "413--419",

journal = "Journal of Biomedical Engineering",

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T1 - Quantitative analysis of four EMG amplifiers

AU - Perreault, E. J.

AU - Hunter, I. W.

AU - Kearney, R. E.

N1 - Funding Information: This work was su ported by the Medical Research Council of Cana X a and the Natural Sciences and Engineering Research Council of Canada. We would also like to thank Dr Stephen Jacobsen of the University of Utah and his colleagues from Iomed, Inc., for the loan of the Motion Control amplifiers.

PY - 1993/9

Y1 - 1993/9

N2 - Four typical EMG amplifiers were tested quantitatively to observe the diversity and specificity of available equipment. Gain, phase, common mode rejection ratio (CMRR) and noise characteristics were measured for each device. Various gain and phase responses were observed, each best suited to specific application areas. For all amplifiers, the CMRR was shown to decrease dramatically in the presence of input impedance mismatches of more than 10 kΩ between the two electrodes. Because such impedance mismatches are common on the skin surface, these results indicate that proper skin preparation is required to maximize the noise rejection capabilities of the tested amplifiers.

AB - Four typical EMG amplifiers were tested quantitatively to observe the diversity and specificity of available equipment. Gain, phase, common mode rejection ratio (CMRR) and noise characteristics were measured for each device. Various gain and phase responses were observed, each best suited to specific application areas. For all amplifiers, the CMRR was shown to decrease dramatically in the presence of input impedance mismatches of more than 10 kΩ between the two electrodes. Because such impedance mismatches are common on the skin surface, these results indicate that proper skin preparation is required to maximize the noise rejection capabilities of the tested amplifiers.

KW - EMG signal processing

KW - Electromyography

KW - amplifier

KW - common mode rejection ratio

KW - frequency response

KW - noise measurements

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JF - Journal of Biomedical Engineering

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Quantitative analysis of four EMG amplifiers

Abstract

Keywords

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