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

Author

Koppa, Santosh ; Dongwon Park ; Youngjoong Joo ; Sungyong Jung

Author_Institution

Dept. of Electr. & Comput. Eng., UTSA, San Antonio, TX, USA

fYear

2011

fDate

7-10 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

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.

Keywords

CMOS image sensors; trigger circuits; CIS; DR; SNR self-reset CMOS image sensor; Schmitt trigger circuit; comparator offset; dynamic-range; gain 105.6 dB; gain 65 dB; offset cancellation technique; reset delay; reset offset; size 0.5 mum; Field programmable gate arrays; IIR filters; Optical filters; Optical imaging; Optical sensors; Optical variables measurement; Oscilloscopes; CMOS image sensor; Dynamic range; Schmitt trigger; Signal to Noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Seoul

ISSN

1548-3746

Print_ISBN

978-1-61284-856-3

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2011.6026323

Filename

6026323