Design of Variable Gain Amplifier Circuit Based on Newton Rings Stress

DOI

10.2991/cmfe-15.2015.198How to use a DOI?

Keywords

gain variable; Amplifier circuit; nstrumentation; newton rings;INA128.

Abstract

On the purpose of measuring Newton rings deformation stress and the intelligentialize of the newton rings apparatus, a Variable Gain Amplifier circuit which is based on a low power, general purpose instrumentation amplifiers INA128 offering excellent accuracy was designed to amplify the low frequency and voltage signal from the Pressure sensor. The principle of circuit and the information of chips used were introduced detailedly. Intermediately, problem which appeared in the program of the design had been figured out. Finally, test the performance of the circuit and analyze the experimental data with MATLAB, results were as follws, when the gain is equal to 33.97dB(Magnified 50 times),the bandwidth is up to 599kHz; when the gain is equal to 40dB(Magnified 100 times),the bandwidth is up to 250kHz; when the gain is equal to 53.98dB(Magnified 500 times),the bandwidth is up to 39kHz.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Changli Guo
AU  - Shouquan Wang
AU  - Yu Chai
AU  - Zhaoxia Guo
PY  - 2015/07
DA  - 2015/07
TI  - Design of Variable Gain Amplifier Circuit Based on Newton Rings Stress
BT  - Proceedings of the International Conference on Chemical, Material and Food Engineering
PB  - Atlantis Press
SP  - 839
EP  - 842
SN  - 2352-5401
UR  - https://doi.org/10.2991/cmfe-15.2015.198
DO  - 10.2991/cmfe-15.2015.198
ID  - Guo2015/07
ER  -