Title :
Frequency dependence of gas-dielectric capacitors used in sub-nA reference current generators
Author :
Giblin, S.P. ; Willenberg, G.D. ; Fletcher, N.E.
Author_Institution :
Nat. Phys. Lab., Teddington, UK
Abstract :
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.
Keywords :
capacitors; electric generators; reference circuits; commercial air-dielectric capacitors; frequency dependence; gas-dielectric capacitors; sealed-gas capacitors; sub-nA reference current generators; Bridge circuits; Capacitance measurement; Capacitors; Dielectric measurements; Frequency dependence; Frequency measurement; Integrated circuit noise; Laboratories; Measurement standards; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5543771
