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Femtoampere current reference stable over atmospheric temperatures

Abstract:

Calibration of ultralow current ammeters deployed in atmospheric ion counters requires stable current references operating at high source impedance. Using standard precision components, this current reference generates equal bipolar currents of nominally ±500fA, cyclically for 32 s each. The currents were found to be stable to 2 fA over the temperature range - 20 to 20°C, typical of atmospheric conditions. The output current is delivered via a capacitor, and by arranging for the capacitor to ...

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Publication status:
Published

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Publisher copy:
10.1063/1.1304859

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Journal:
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume:
71
Issue:
8
Pages:
3231-3232
Publication date:
2000-08-01
DOI:
ISSN:
0034-6748
Source identifiers:
151556
Language:
English
Pubs id:
pubs:151556
UUID:
uuid:67d33382-61b6-46f3-9a39-fdbfe0885f60
Local pid:
pubs:151556
Deposit date:
2012-12-19

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