Improvements in the precision measurement of capacitance
作者:
G.H.Rayner,
L.H.Ford,
期刊:
Proceedings of the IEE - Part B: Electronic and Communication Engineering
(IET Available online 1960)
卷期:
Volume 107,
issue 32
页码: 185-189
年代: 1960
DOI:10.1049/pi-b-2.1960.0097
出版商: IEE
数据来源: IET
摘要:
All measurements of capacitance and resistance at the N.P.L. depend ultimately upon the Campbell standard of mutual inductance and upon frequency. Hitherto capacitance has been obtained from mutual inductance and resistance using a Carey-Foster type of network. The precision obtained with this in the Astbury bridge has been considerably improved since it was constructed 20 years ago, and an accuracy of repetition of about five parts in 106is now obtained. Capacitance can also be derived from resistance and frequency; a Wien bridge has recently been constructed for this purpose. It has been designed to make a single precise measurement of capacitance (the repetition accuracy is two parts in 106) and thereby to complete a system of three measurements relating capacitance, resistance and mutual inductance in conjunction with frequency.
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