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CMOS Image Sensor with Self Reset Pixel Architecture
Stanford Reference:
99-060
Abstract
By integrating image detection and processing on a single chip, CMOS sensors provide a great advantage over CCD sensors. However, as technology scales, the CMOS sensor's dynamic range and signal-to-noise ratio (SNR) decrease dramatically. The CMOS image sensor overcomes this effect by utilizing self-reset pixel architecture, in which pixels reset when their collected charge reaches well capacity. In this way, the pixels can continue collecting charge far above the supply voltage, thereby providing for reasonable dynamic range and high SNR.
Applications
Digital imaging systems such as digital cameras
Advantages
Sensor will work even as CMOS scales downward below 0.25 um
Much improved image quality due to extended dynamic range and better SNR
Publications
X.Q. Liu, CMOS Image Sensors Dynamic Range and SNR Enhancement via Statistical Signal Processing , Ph.D Thesis, Stanford University, CA, 2002.
Innovators & Portfolio
Abbas El-Gamal
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SukHwan Lim
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Xinqiao (Chiao) Liu
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Patent Status
Published Application: 20030058360
Issued : 6,927,796 (USA)
Date Released
11/6/2002 12:00
Licensing Contact
Mona Wan, Senior Associate Director, Life Science
650-498-0902 (Business)
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Related Keywords
imaging
PS: semiconductor
