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IEICE TRANSACTIONS on Electronics

Design of a Readout Circuit for Improving the SNR of Satellite Infrared Time Delay and Integration Arrays

Chul Bum KIM, Doo Hyung WOO, Hee Chul LEE

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Summary :

This paper presents a novel CMOS readout circuit for satellite infrared time delay and integration (TDI) arrays. An integrate-while-read method is adopted, and a dead-pixel-elimination circuit for solving a critical problem of the TDI scheme is integrated within a chip. In addition, an adaptive charge capacity control method is proposed to improve the signal-to-noise ratio (SNR) for low-temperature targets. The readout circuit was fabricated with a 0.35-µm CMOS process for a 5004 mid-wavelength infrared (MWIR) HgCdTe detector array. Using the circuit, a 90% background-limited infrared photodetection (BLIP) is satisfied over a wide input range (∼200–330 K), and the SNR is improved by 11 dB for the target temperature of 200 K.

Publication
IEICE TRANSACTIONS on Electronics Vol.E95-C No.8 pp.1406-1414
Publication Date
2012/08/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E95.C.1406
Type of Manuscript
PAPER
Category
Electronic Circuits

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