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A 105.6dB DR and 65dB peak SNR self-reset CMOS image sensor using a Schmitt trigger circuit

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4 Author(s)
Koppa, S. ; Dept. of Electr. & Comput. Eng., UTSA, San Antonio, TX, USA ; Dongwon Park ; Youngjoong Joo ; Sungyong Jung

A self-reset pixel level CMOS image sensor (CIS) is designed and tested which provides simultaneous improvements in dynamic-range (DR) and SNR performances. The pixel is fabricated in 0.5-μm 3-metal 2-poly CMOS technology and resulted in DR of 105.6dB with 65dB of peak SNR improvements. A simple Schmitt trigger circuit with offset cancellation technique is utilized to achieve this performance which compensates for the reset offset, comparator offset and reset delay.

Published in:

Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on

Date of Conference:

7-10 Aug. 2011