DocumentCode
779911
Title
A Parametric Radiation Detector Preamplifier
Author
Radeka, V. ; Chase, R.L.
Author_Institution
Brookhaven National Laboratory Upton, N. Y.
Volume
13
Issue
3
fYear
1966
fDate
6/1/1966 12:00:00 AM
Firstpage
477
Lastpage
494
Abstract
A charge-sensitive preamplifier has been built employing a pair of varactor diodes in a novel parametric amplifier configuration as the first amplifying element. The circuit consists of a parametric subharmonic oscillator, pumped at about 130 Mc included in a negative feedback loop. Input charge signals perturb the oscillator tuning. The feedback circuit prevents significant change in the oscillator amplitude by supplying an approximately equal, opposite charge to the input circuit through a small feedback capacitor. The following noise performance, referred to germanium detectors, has been obtained. Temperature FWHM Slope 300°K 1.40 keV 20 ev/pF 77°K 0.64 keV 13 ev/pF
Keywords
Capacitors; Circuit optimization; Diodes; Feedback circuits; Negative feedback loops; Oscillators; Preamplifiers; Radiation detectors; Tuning; Varactors;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1966.4324133
Filename
4324133
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