A Balanced Electrometer Tube and Amplifying Circuit for Small Direct Currents
作者:
G. P. Harnwell,
S. N. Van Voorhis,
期刊:
Review of Scientific Instruments
(AIP Available online 1934)
卷期:
Volume 5,
issue 7
页码: 244-247
ISSN:0034-6748
年代: 1934
DOI:10.1063/1.1751839
出版商: AIP
数据来源: AIP
摘要:
An extension of the DuBridge circuit is described which allows tubes of a fairly wide range of characteristics to be used. The application to the old type FP‐54 and to a tube obtained from the Bell Telephone Laboratories is described. A very stable direct‐current amplifier is also described which may be used independently for the measurement of currents of the order of 10−12amp. or in the output of an electrometer tube circuit.
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