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Proceedings Paper

A design on low noise imaging circuit for SWIR sensor
Author(s): Ben Fan; Zhixue Han; Fei Ma; Shuli Dong
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Paper Abstract

SWIR (Short Wave Infrared) imaging is an important imaging technology in space remote sensing. According to the characteristics of SWIR detector, the whole scheme of low noise imaging circuit is presented in this paper. For certain key circuit which noise is sensitive in the design, such as bias generation circuit, analysis of noise sources and calculation of theoretical noise value of actual circuit which is usually ignored in previous researches are proposed in order to estimate the level of circuit noise and optimize the circuit to reduce noise. The structure of analog filter amplifier circuit is also analyzed by introducing noise-factor analytic approach, based on the analysis result some design principles of the circuit are proposed. The noise suppression methods in the design are separately analyzed in both time suppression and space suppression; some specific methods for these two kinds of measures are listed in this paper. The final experiment results indicate that the low noise imaging circuit design based on above methods is reasonable and effective, the circuit has a higher SNR and can work normally at room temperature, and the whole design meets the original requirement of low noise. This low noise circuit for SWIR detector and its methods to analyze and calculate noise value are valuable examples for future similar designs.

Paper Details

Date Published: 3 November 2016
PDF: 8 pages
Proc. SPIE 10030, Infrared, Millimeter-Wave, and Terahertz Technologies IV, 1003015 (3 November 2016); doi: 10.1117/12.2242715
Show Author Affiliations
Ben Fan, Beijing Institute of Space Mechanics and Electricity (China)
Zhixue Han, Beijing Institute of Space Mechanics and Electricity (China)
Fei Ma, Beijing Institute of Space Mechanics and Electricity (China)
Shuli Dong, Beijing Institute of Space Mechanics and Electricity (China)

Published in SPIE Proceedings Vol. 10030:
Infrared, Millimeter-Wave, and Terahertz Technologies IV
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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