Novel integrated readout circuit of variable integration time with background suppression for quantum dot infrared photo-detectors

Yi-Chuan Lu; Hsiu-Li Shieh; Sen-Chuan Hung; Tai-Ping Sun; Meng-Lieh Sheu; Shiang-Feng Tang; Cheng-Der Chiang

doi:10.1117/12.835587

4 August 2009 Novel integrated readout circuit of variable integration time with background suppression for quantum dot infrared photo-detectors

Yi-Chuan Lu, Hsiu-Li Shieh, Sen-Chuan Hung, Tai-Ping Sun, Meng-Lieh Sheu, Shiang-Feng Tang, Cheng-Der Chiang

Author Affiliations +

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 73833F (2009) https://doi.org/10.1117/12.835587
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

This paper discussed about a readout circuit for Quantum Dot Infrared Photodetector (QDIP) Focal-Plane-Array (FPA) imaging system. The readout circuit employed a modified regulated cascode circuit to stabilize the bias of QDIP. The readout circuit consisted of in-pixel dark current cancellation circuit, sensed current integration and in-pixel switch integration capacitor. The chip worked at 5V power supply and operated at 1MHz clock rate. Output voltage ranging from 2 volt to 4 volt was generated when the sensing current from 10nA to 100nA, the dark current was set up to 100nA. The total power consumption was less than 3.3 mW. The dimension of unit pixel was 30×30μm and the integration capacitance was about 0.24pF. The 8×8 pixels array readout circuit of in-pixel variable integration capacitors was implemented by using TSMC 0.35μm Mixed Signal 2P4M CMOS process.

Citation Download Citation

Yi-Chuan Lu, Hsiu-Li Shieh, Sen-Chuan Hung, Tai-Ping Sun, Meng-Lieh Sheu, Shiang-Feng Tang, and Cheng-Der Chiang "Novel integrated readout circuit of variable integration time with background suppression for quantum dot infrared photo-detectors", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73833F (4 August 2009); https://doi.org/10.1117/12.835587

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