Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1986-07-31
1988-11-22
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
3072991, G01J 100
Patent
active
047868090
ABSTRACT:
A preamplifier circuit provides a low noise, low power buffer preamplification stage for interfacing low output impedance, low noise sensors to a readout circuit at cryogenic temperatures. The preamplifier circuit may be formed of discrete components, or it may be formed as an integrated circuit that may have a plurality of channels. Each channel includes a germanium bipolar transistor exposed to a cryogenic environment for providing voltage gain and impedance matching to interface the sensor ouptut with a multiplexer.
REFERENCES:
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patent: 2847583 (1958-08-01), Lin
patent: 4143269 (1979-03-01), McCormack et al.
patent: 4421985 (1983-12-01), Billingsley et al.
patent: 4682032 (1987-07-01), Barrett
"Low Temperature Operation of Ge Picosecond Logic Circuits," by E. S. Schlig, J. of Solid Static Circuits, Sep. 1968, pp. 271-276.
"Effects of Low Temperature on Transistor Characteristics," by A. B. Credle, IBM Journal, Jan. 1958, pp. 54-71.
"Low Level Signal Amplifiers at Cryogenic Temperatures," by Anderson et al. (1970), pp. 211-214.
"Integrated CCD-Bipolar for Focal Plane Processing of IR Signals," by Grant et al. (1975), pp. 53-58.
"A CCD Multiplexer with Forty Coupled Inputs," by Emmons et al. (1975), pp. 43-52.
Howell Janice A.
Karambelas A. W.
Laslo V. G.
Santa Barbara Reseach Center
Schubert W. C.
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