Excitation Frequency Effect of Differential Capacitance Transducer for Equivalence Principle Test

Chin. Phys. Lett.

2004, Vol. 21

Issue (7): 1208-1211 DOI:

Original Articles

Excitation Frequency Effect of Differential Capacitance Transducer for Equivalence Principle Test

ZHOU Ze-Bing;DONG Ying-Jie;TIAN Yu-Long;QIN Dan;LUO Jun

Department of Physics, Huazhong University of Science and Technology, Wuhan 430074

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ZHOU Ze-Bing, DONG Ying-Jie, TIAN Yu-Long et al 2004 Chin. Phys. Lett. 21 1208-1211

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Abstract We discuss effects of the excitation frequency in an ac bridge differential capacitance transducer for the equivalence-principle test on the frequency-dependent characteristics of a practical operational amplifier, the thermal noise limitation, and stray-immune. Basic requirements of choosing the excitation frequency of the ac bridge capacitance transducer are given based on the three effects, which are significant for designing a capacitance transducer and choosing proper electric elements.

Keywords: 04.80.Cc 07.07.Df

Published: 01 July 2004

PACS:	04.80.Cc	(Experimental tests of gravitational theories)
	07.07.Df	(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2004/V21/I7/01208

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