A 21.4 pW/frame-pixel PWM image sensor with sub-threshold leakage reduction and two-step readout

IEICE Electronics Express

Hui Wang¹  Zhiqing Chen¹  Songlin Feng¹  Li Tian¹  Chuifu Dan¹  Yiling Ding¹  Qi Zhang¹ 

[1] Shanghai Advanced Research Institute, Chinese Academy of Sciences

关键词: image sensor;    low power;    pulse-width-modulation (PWM);   

DOI  :  10.1587/elex.12.20150711

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(20)In this work we present a sub-1V pulse-width-modulation (PWM) CMOS image sensor. Ultra-low power consumption is achieved through the sub-threshold pixel bias, time-to-digital conversion and the array-level asynchronous counter. The 2-step readout scheme is adopted to improve the frame rate up to 68 fps. The prototype chip with 64 × 64 array has been fabricated in a 0.18 µm 1P6M CMOS process. Minimum functional analog supply of 0.36 V can be achieved, and the whole chip consumes only 1.14 µW at 13 fps, or 21.4 pW/frame-pixel. The dynamic range and FPN are measured to be 70 dB and 0.49% respectively.

【 授权许可】

Unknown