CMRR Analysis of the 3 Op-Amp Instrumentation Amplifier with Noise

Tie Feng Wu; Zhi Chao Zhao; De Wei Dai; Shun Ji Piao; Jing Li

doi:10.4028/www.scientific.net/AMM.488-489.1096

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 488-489CMRR Analysis of the 3 Op-Amp Instrumentation...

CMRR Analysis of the 3 Op-Amp Instrumentation Amplifier with Noise

Abstract:

This paper researches the common mode rejection ratio (CMRR) of 3 op-amp instrumentation amplifier of amplifying weak signal and presents a new calculation modal considering noise, non-ideal amplifiers, matched resistor and application restricted by the factors of affecting CMRR. At last, a instrumentation amplifier was designed and built and its measured and computed results of modal are compared. The results show that this modal presented enhances calculating precision and extends application range of instrumentation amplifier. It is valid and reasonable.

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Periodical:

Applied Mechanics and Materials (Volumes 488-489)

Pages:

1096-1099

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.488-489.1096

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Online since:

January 2014

Authors:

Tie Feng Wu, Zhi Chao Zhao*, De Wei Dai, Shun Ji Piao, Jing Li

Keywords:

CMRR, Instrumentation Amplifier, Matched Resistor, Noise, Non-Ideal Amplifier

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* - Corresponding Author

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