Please use this identifier to cite or link to this item:

A hybrid CMOS DPS with conditional data readout scheme

Authors Lau, K.L. HKUST affiliated (currently or previously)
Léomant, S.
Bermak, A. View this author's profile
Issue Date 2010
Source Proceedings - 5th IEEE International Symposium on Electronic Design, Test and Applications, DELTA 2010 , 2010, p. 44-47
Summary In this paper, a hybrid CMOS pulse width modulation (PWM) digital pixel sensor (DPS) is proposed. In order to reduce the pixel area, the proposed architecture requires only a two bit on-pixel memory while placing the remaining six bits outside the array, assuming a common resolution of eight bits. This new architecture reduces the size of the pixel significantly as the memory requirement at pixel level is divided by 4. The eight bit resolution is maintained by scanning the array of pixels periodically during the integration period. In addition, a conditional data readout scheme is proposed in order to reduce the unnecessary read operations of pixel-level memories. Therefore, switching activity of data buses and dynamic power are kept under control. In our implementation, the pixel contains only 21 transistors and occupies an area of about 9μm × 9μm, with a fill factor of 12% using a 0.18μm CMOS process. Simulation results show a 50% reduction of read bit-lines switching activity at low illumination conditions, using our conditional readout scheme. © 2010 IEEE.
Rights © 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Language English
Format Conference paper
Access View full-text via DOI
View full-text via Scopus
Files in this item:
File Description Size Format
AHybridCMOS.pdf 1101523 B Adobe PDF