Design of the ramp generator for UIRFPA

Baobin Liao; Longcheng Que; Qiao Jiang; Wei He; Yun Zhou; Jian Lv; Zhiming Wu

doi:10.1117/12.973723

15 October 2012 Design of the ramp generator for UIRFPA

Baobin Liao, Longcheng Que, Qiao Jiang, Wei He, Yun Zhou, Jian Lv, Zhiming Wu

Proceedings Volume 8419, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy; 841925 (2012) https://doi.org/10.1117/12.973723
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

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.

Citation Download Citation

Baobin Liao, Longcheng Que, Qiao Jiang, Wei He, Yun Zhou, Jian Lv, and Zhiming Wu "Design of the ramp generator for UIRFPA", 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); https://doi.org/10.1117/12.973723

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