An integrating preamplifier for indium antimonide infrared detectors

Details An integrating preamplifier for indium antimonide infrared detectors An integrating preamplifier for indium antimonide infrared detectors

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..368b&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 92, June 1980, p. 368-374.

Astronomy and Astrophysics

Astronomy

46

Astronomical Spectroscopy, Infrared Astronomy, Preamplifiers, Semiconductor Devices, Circuit Diagrams, Field Effect Transistors, Indium Antimonides

Scientific paper

A circuit for InSb detectors, the most popular 1-5 micron detector in astronomical applications, is presented in which the feedback resistor is replaced by an integrating capacitor. The circuit is free from disadvantages associated with a large feedback resistor, such as saturation and the time constant that causes a reduction in the signal under conditions of rapid sampling. The main advantage of the new circuit is its versatility: it has a wide dynamic range, the sample rate may be selected from a range of four orders of magnitude, precision measurement of incident radiation and precision timing of events are possible, it has a fast spectrum-scanning mode, and may be operated in a purely dc mode.

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