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Proceedings Paper

A low-noise wide-dynamic-range UV detector with pixel-level A/D conversion
Author(s): Wenjing Zhang; Xichang Bao; Ling Wang; Chao Li; Yonggang Yuan; Xiangyang Li
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Paper Abstract

This paper presents a low-power low-noise wide-dynamic-range GaN-based UV detector with pixel-level A/D conversion. The detector comprised an array of 50×50μm2 pixels with a multi-channel bit serial (MCBS) ADC in each pixel. Each pixel contains a UV photo-detector, a 1-bit comparator and a 3-T memory cell. The A/D conversion is performed simultaneously for all pixels. The digital data is read out from the pixel array in manner of a random access digital memory. Since there are many ADCs operating simultaneously, power consumption for each ADC must be minimized. To satisfy the low power consumption, A power-down circuit is introduced in. The minimal value for ADC resolution and the frame rate are 10bits and 100f/s respectively. A high GBW comparator is designed to satisfy this demand. In order to suppress the FPN and 1/f noise a digital correlated double sampling (CDS) is adopted in this application.

Paper Details

Date Published: 24 August 2009
PDF: 6 pages
Proc. SPIE 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, 73810W (24 August 2009); doi: 10.1117/12.835686
Show Author Affiliations
Wenjing Zhang, Shanghai Institute of Technical Physics (China)
Xichang Bao, Shanghai Institute of Technical Physics (China)
Ling Wang, Shanghai Institute of Technical Physics (China)
Chao Li, Shanghai Institute of Technical Physics (China)
Yonggang Yuan, Shanghai Institute of Technical Physics (China)
Xiangyang Li, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 7381:
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors
Xu-yuan Chen; Yue-lin Wang; Zhi-ping Zhou; Qing-kang Wang, Editor(s)

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