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Proceedings Paper

Design of a ROIC with high dynamic range for LWIR FPAs
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Paper Abstract

In this paper, a high performance readout integrated circuit (ROIC) designed for long wave infrared (LWIR) detectors is introduced, which has high dynamic range (HDR). To accommodate the wide scene dynamic range requirement, special circuit architecture is used to the input unit cell. A capacitive feedback transimpedance amplifier (CTIA) as input circuit is used to provide high injection efficiency, low input resistance, good linearity, precise voltage bias. Because of the restriction of the layout area, four unit cells will share an integration capacitor and each unit cell has a correlated double sampling (CDS) circuit, which allows the infrared focal plane arrays (IRFPA) to be operated in full frame snapshot mode and provides the maximum integration time available. The charge transfer circuit is used and we don't need to consider the drive ability of the unit cell. The simulation results confirm that the ROIC provides over a factor of 70dB dynamic range with the 5.0v power supply.

Paper Details

Date Published: 11 November 2014
PDF: 8 pages
Proc. SPIE 9275, Infrared, Millimeter-Wave, and Terahertz Technologies III, 927518 (11 November 2014); doi: 10.1117/12.2071838
Show Author Affiliations
Yongcheng Zhai, Shanghai Institute of Technical Physics (China)
Graduate School of Chinese Academy of Sciences (China)
Ruijun Ding, Shanghai Institute of Technical Physics (China)

Published in SPIE Proceedings Vol. 9275:
Infrared, Millimeter-Wave, and Terahertz Technologies III
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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