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Optimization of Timing and Control Circuit for Low Power ROIC Design

International Journal of Electrical and Electronic Science
Vol.3 , No. 2, Publication Date: Mar. 28, 2016, Page: 8-12

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Authors

[1]	Hari Shanker Gupta, Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India.
[2]	M. Shojaei Baghini, Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India.
[3]	A. S. Kiran Kumar, Space Applications Centre, Jodhpur Tekra, Ahmedabad, India.
[4]	Dinesh K. Sharma, Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India.

Abstract

Infrared detectors are normally bonded with ROICs using indium bumps. High spatial resolution and large field of view demands for large area ROIC array and reduced pixel size. Pixel size reduction and large number of pixels requirements, increases complexity of supporting read out circuits, interfaces and power demands. The timing and control clocks are required for proper pixel selection and signal processing of pixel information. In general, pixels are sequentially selected and the pixel information is transferred to the ROIC output after necessary processing. The traditional timing approach leads to the requirements of high power budgets for the selection of column amplifier. This paper proposes a timing and control design for column amplifier selection and its power minimization. The technique has been implemented on a test chip of 4×4 ROIC array and achieved 70% reduction in power budget of column amplifiers. The paper will discuss experimental results from the test chip and its estimation for large pixel arrays.

Keywords

Pixel, Pitch, Readout Integrated Circuit (ROIC), Column, Row etc.

Reference

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