Journal ArticleDOI
A 256/spl times/256 CMOS imaging array with wide dynamic range pixels and column-parallel digital output
S.J. Decker,D. McGrath,K. Brehmer,Charles G. Sodini +3 more
- Vol. 33, Iss: 12, pp 2081-2091
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TLDR
A 256x256 CMOS active pixel sensor (APS) is described for an automotive stereo-vision system that simultaneously provides flexibility, user-adjustability, and digital control, with no reduction of fill factor.Abstract:
A 256x256 CMOS active pixel sensor (APS) is described for an automotive stereo-vision system. Illumination may vary over several orders of magnitude, requiring a high dynamic range imager. Dynamic range is increased 20/spl times/ using a special clocking scheme for the lateral overflow gate. This dynamic range enhancement offers improvements over previously-described techniques. It simultaneously provides flexibility, user-adjustability, and digital control, with no reduction of fill factor. On-chip column-parallel cyclic analog-to-digital converters (ADCs) produce digital output at frame rates from 30 to 390 frames/s.read more
Citations
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Journal ArticleDOI
Sensitivity Controllable CMOS Image Sensor Pixel Using Control Gate Overlaid on Photodiode
TL;DR: In this paper, a new sensitivity controllable pixel structure was proposed for CMOS active-pixel image sensor, which has a sensitivity control gate overlaid on the photodiode.
Journal ArticleDOI
Extended use of incremental signal-to-noise ratio as reliability criterion for multiple-slope wide-dynamic-range image capture
TL;DR: Measurements and computer simulations reveal that the observed trade-off between WDR extension and the loss of local detail can be explained by a drop in iSNR at each reset point, which has become the critical criterion when maximizing dynamic range to maintain the minimum necessary level of detection reliability.
Journal ArticleDOI
A DVP-Based Bridge Architecture to Randomly Access Pixels of High-Speed Image Sensors
Tareq Khan,Khan A. Wahid +1 more
TL;DR: A design of a novel bridge is proposed to interface digital-video-port (DVP) compatible image sensors with popular microcontrollers that can support a data rate up to 254 megasamples/sec and its applications may include pattern recognition, robotic vision, tracking system, and medical imaging.
Proceedings ArticleDOI
A 105.6dB DR and 65dB peak SNR self-reset CMOS image sensor using a Schmitt trigger circuit
TL;DR: In this article, a self-reset pixel level CMOS image sensor (CIS) is designed and tested which provides simultaneous improvements in dynamic-range (DR) and SNR performances.
Book ChapterDOI
Circuits for high performance complementary metal-oxide-semiconductor (CMOS) image sensors
TL;DR: In this article, the authors present a review of the circuits used to provide improvements in CMOS image sensors, including noise reduction, pixel count, capture speed enhancement, global shuttering, power reduction as well as dynamic range improvement.
References
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CMOS image sensors: electronic camera-on-a-chip
TL;DR: In this article, the requirements for CMOS image sensors and their historical development, CMOS devices and circuits for pixels, analog signal chain, and on-chip analog-to-digital conversion are reviewed and discussed.
Journal ArticleDOI
A ratio-independent algorithmic analog-to-digital conversion technique
TL;DR: An algorithmic analog-to-digital conversion technique is described which is capable of achieving high-resolution conversion without the use of matched capacitors in an MOS technology.
Book
Charge Transfer Devices
TL;DR: It is projected that charge transfer devices will rapidly find their way into certain analog delay, image sensing, and digital applications.
Journal ArticleDOI
256/spl times/256 CMOS active pixel sensor camera-on-a-chip
TL;DR: In this paper, an active pixel sensor (APS) is integrated on a CMOS chip with the timing and control circuits, and signal conditioning to enable random access, low power (/spl sim/5 mW) operation, and low read noise (13 e/sup -/ rms).