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Frequency dependence of gas-dielectric capacitors used in sub-nA reference current generators

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3 Author(s)
S. P. Giblin ; National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, U.K. ; G. -D. Willenberg ; N. E. Fletcher

We measure the frequency dependence of a sample of commercial air- and gas-dielectric capacitors between 1 kHz and ≈0.01 Hz. We find that the capacitance of sealed-gas capacitors can change by more than 100 μF/F over this range. This has important implications for the use of gas capacitors in reference sub-nA current generators.

Published in:

CPEM 2010

Date of Conference:

13-18 June 2010