14 May 2007 A high SNR readout circuit design for TDI array with adaptive charge capacity control
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Proceedings Volume 6542, Infrared Technology and Applications XXXIII; 65423U (2007); doi: 10.1117/12.719143
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States
Abstract
In this paper, a novel high SNR readout circuit for a satellite TDI array is presented. Since an input range of an IR image for environmental satellites is broad and especially the cloud top temperature (CTT) that is important in understanding phenomena of atmosphere is quite low, the readout of low temperature signal is important in satellite applications. However, the noise resulted from a readout circuit is no longer ignorable compared to a detector shot noise at low IR radiation. Hence, an adaptive charge capacity control method is proposed in this paper for an improved SNR at low temperature. It is found that SNR is improved as much as 11dB at 200K and 90% background-limited infrared photodetection (BLIP) condition is satisfied over a total input range by simulation.
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Chul Bum Kim, Chi Ho Hwang, Yong Soo Lee, Hee Chul Lee, "A high SNR readout circuit design for TDI array with adaptive charge capacity control", Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65423U (14 May 2007); doi: 10.1117/12.719143; https://doi.org/10.1117/12.719143
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KEYWORDS
Signal to noise ratio

Capacitors

Satellites

Sensors

Adaptive control

Clouds

Infrared imaging

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