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Proceedings Paper

Design of the ramp generator for UIRFPA
Author(s): Baobin Liao; Longcheng Que; Qiao Jiang; Wei He; Yun Zhou; Jian Lv; Zhiming Wu
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Paper Abstract

This paper designs a ramp generating circuit using for uncooled infrared focal plane arrays (UIRFPA). Compared with the basic ramp generator, the new generator is highly adjustable, easy to operate, and adaptable. By adjusting the total current of the charging circuit, it can realize the ramp wave upper point and slope of the modulation. Current mirror as the discharge load, it can adjust the ramp lower point, and controllable capability. By adjusting accuracy and swing, the new ramp generator for UIRFPA provides a way to adapt to the strength of the infrared scene to control the infrared signal accuracy. Simulation results show that the ramp output swing can be adjusted from 1 V to 4.5 V, a maximum Integral nonlinearity (INL) of 400 µV, a slope distortion lower than 0.01%, linearity higher than 13 bits for the new ramp generator (considering a 4 V input range). At the same time, its good temperature performance shows that the maximum difference of the output voltage is 50 mV in a variety of environments (243 K ~ 333 K). Besides, this circuit has been successfully applied to the infrared system.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8419, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy, 841925 (15 October 2012); doi: 10.1117/12.973723
Show Author Affiliations
Baobin Liao, Univ. of Electronic Science and Technology of China (China)
Longcheng Que, Univ. of Electronic Science and Technology of China (China)
Qiao Jiang, Univ. of Electronic Science and Technology of China (China)
Wei He, Univ. of Electronic Science and Technology of China (China)
Yun Zhou, Univ. of Electronic Science and Technology of China (China)
Jian Lv, Univ. of Electronic Science and Technology of China (China)
Zhiming Wu, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 8419:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy
Yadong Jiang; Junsheng Yu; Zhifeng Wang, Editor(s)

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