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A 1.8V readout integrated circuit with adaptive transimpedance control amplifier for IR Focal Plane Arrays

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5 Author(s)
Lo-Wei Huang ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Chih-Cheng Hsieh ; Wen-Hsu Chang ; Juang, Y.-Z.
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A readout integrated circuit (ROIC) with adaptive transimpedance control (ATC) amplifier for Infrared Focal Plane Arrays (IR FPAs) is presented in this paper. The proposed ATC readout circuit is consisted of a front-end transimpedance amplifier (TIA) with an adaptive feedback capacitance. The output signal is fed to a comparator which determines a set of gain code (S0~S1) to control the feedback capacitance selected from a capacitor array. A CMOS image sensor chip with 32×32 pixel array and 30×30μm2 pixel size has been designed and fabricated in 0.18μm CMOS technology. It achieves a 24dB improvement of dynamic range, a frame rate of 22 fps, a power-per-pixel of 5μW/pixel and the total power of 5.5mW, respectively. The proposed ATC amplifier provides an optimized solution for IR FPA with wide dynamic range (WDR) operated at 1.8V supply.

Published in:

Sensors, 2011 IEEE

Date of Conference:

28-31 Oct. 2011