標題: A low-photocurrent CMOS retinal focal-plane sensor with pseudo-BJT smoothing network and adaptive current Schmitt trigger for scanner applications
作者: Wu, CY
Chiang, CT
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 2003
摘要: In this paper, a new structure of low-photocurrent CMOS retinal focal-plane sensor with pseudo-BJT smoothing network and adaptive current Schmitt trigger is proposed. The proposed structure is very simple and compact. This new circuit can be easily implemented in CMOS technology with a small chip area. Besides, another innovation of this circuit is that the proposed circuit could be operated for low-induced current level (pA), and the current hysteresis of proposed current Schmitt trigger could be adjusted adaptively according to the value of induced photocurrent. In this paper, the detection of static and moving objects, such as a moving white bar, are proven by projecting a pattern through HSPICE simulation. The proposed retinal focal-plane sensor includes 32 x 32 pixel array with a pixel size of 70 x 70 mum(2). The fill factor is 75% and the total chip area is 3000 x 3030 mum(2). It is with fully functional 32 x 32 implementations consuming less than 8.8 muW per pixel at 3.3 V. Measurement results present the proposed retinal focal-plane sensor could be successfully used in character recognition, such as pen-scanner or etc.
URI: http://hdl.handle.net/11536/18484
ISBN: 0-7803-8133-5
ISSN: 1930-0395
期刊: PROCEEDINGS OF THE IEEE SENSORS 2003, VOLS 1 AND 2
起始頁: 1147
結束頁: 1152
顯示於類別:會議論文