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Ultra-low-noise, high-impedance preamp for cryogenic detectors

Brown, E. R. (1985) Ultra-low-noise, high-impedance preamp for cryogenic detectors. Electronics Letters, 21 (10). pp. 417-418. ISSN 1350-911X. doi:10.1049/el:19850296.

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A preamplifier design is presented which is based on a common-drain JFET input. The midband noise performance is E_n = 0.42 nV/Hz^½, In = 2.8 fA/Hz^½. The circuit has considerably less input capacitance than comparably noisy common-source amplifiers. It is particularly useful for preamplification of 0.1 to 10 MHz signals from liquid-helium-cooled radiation detectors.

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Additional Information:© 1985 The Institution of Electrical Engineers. 22nd March 1985. The author wishes to thank Colin Masson for stimulating conversations and a critical reading of the manuscript, and Glen Abrahams who assisted in the construction of the circuit. The work was supported by NASA grant NAGW-107.
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Issue or Number:10
Record Number:CaltechAUTHORS:20170719-173551016
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Official Citation:Brown, E.R.: 'Ultra-low-noise, high-impedance preamp for cryogenic detectors', Electronics Letters, 1985, 21, (10), p. 417-418, DOI: 10.1049/el:19850296 IET Digital Library,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79223
Deposited By: Kristin Buxton
Deposited On:20 Jul 2017 18:55
Last Modified:15 Nov 2021 17:46

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