Translator Disclaimer
Paper
21 November 2001 Digital vision sensor with pixel level analog-to-digital converter
Author Affiliations +
Abstract
In this paper we propose an on-pixel Analog-to-Digital converter based on pulse frequency modulation (PFM) scheme. This PFM based converter presents a very viable solution for pixel level based ADC. It uses a very simple and robust circuit that can be implemented in a compact area resulting in a 23% fill-factor. The low-light performance of the PFM converter is improved by using a wider counting period. By modifying the counting period, it is possible to change the saturation level of the ADC and hence improve the dynamic range of the sensor. Image lag is eliminated in the PFM On-pixel ADC since a reset of the photodetector is performed after the conversion period. In addition, the PFM on-pixel ADC has a very important advantage: it is insensitive to variations of the supply and reference voltages. The pixel based ADC has been designed and fabricated using CMOS 0.25micrometers technology.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Amine Bermak, Abdesselam Bouzerdoum, and Kamran Eshraghian "Digital vision sensor with pixel level analog-to-digital converter", Proc. SPIE 4591, Electronics and Structures for MEMS II, (21 November 2001); https://doi.org/10.1117/12.449166
PROCEEDINGS
6 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

A logarithmic low dark current CMOS pixel
Proceedings of SPIE (April 29 2016)
Applications of CMOS image sensors: state-of-the-art
Proceedings of SPIE (November 01 2012)
Log polar image sensor in CMOS technology
Proceedings of SPIE (August 21 1996)
High-speed camera based on a CMOS active pixel sensor
Proceedings of SPIE (February 29 2000)

Back to Top