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

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3 Author(s)
Giblin, S.P. ; Nat. Phys. Lab., Teddington, UK ; Willenberg, G.D. ; Fletcher, N.E.

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:

Precision Electromagnetic Measurements (CPEM), 2010 Conference on

Date of Conference:

13-18 June 2010