A non-destructive readout circuit of the linear array image sensor with over 90dB dynamic range and 190k fps for radar system

Cong-jie Yang; Zhi-yuan Gao; Xin-ji Zeng; Su-ying Yao; Jing Gao

doi:10.1117/12.2182154

13 April 2015 A non-destructive readout circuit of the linear array image sensor with over 90dB dynamic range and 190k fps for radar system

Cong-jie Yang, Zhi-yuan Gao, Xin-ji Zeng, Su-ying Yao, Jing Gao

Author Affiliations +

Proceedings Volume 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II; 95222P (2015) https://doi.org/10.1117/12.2182154
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held August-October 2014, 2014, China, China

Abstract

This paper presents a non-destructive readout circuit of the linear array image sensor with wide dynamic range and high speed readout for radar system. A multi-capacitor and self-regulated capacitive trans-impedance amplifier (CTIA) structure is employed to extend the dynamic range. The gain of the CTIA is auto adjusted by switching different capacitors to the integration node asynchronously according to the output voltage. A class AB OPA is utilized to drive all the additional capacitors to achieve high speed readout. A photo response curve presents as a polyline with 5 segments, which enables a 101.7 dB dynamic range. In addition, the exposure time is 5.12us in the simulation, then an over 190k fps is achieved.

Citation Download Citation

Cong-jie Yang, Zhi-yuan Gao, Xin-ji Zeng, Su-ying Yao, and Jing Gao "A non-destructive readout circuit of the linear array image sensor with over 90dB dynamic range and 190k fps for radar system", Proc. SPIE 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II, 95222P (13 April 2015); https://doi.org/10.1117/12.2182154

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