Low-bias CTIA multiplexer for 1024-element InGaAs line sensors

Details Low-bias CTIA multiplexer for 1024-element InGaAs line sensors Low-bias CTIA multiplexer for 1024-element InGaAs line sensors

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2226..152k&link_type=abstract

Proc. SPIE Vol. 2226, p. 152-171, Infrared Readout Electronics II, Eric R. Fossum; Ed.

Physics

Scientific paper

A design is presented for 512-element CTIA multiplexer developed for readout of an array of 1024-element InGaAs detectors for operation with a bias voltage in the range of +/- 10 mV. This multiplexer can be operated with a left-to-right or right-to-left scan, a non- destructive sequential readout with line-by-line selectable detector reset, and with or without input-MOSFET-threshold uniformity correction. The optical integration time in the range from 20 ms to 10 min is selectable in multiples of 20 to 40 ms line times. The multiplexer cell architecture includes a differential CTIA with open-loop gain of about 5000, a CDS circuit, and two unity-grain buffer amplifiers.

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