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ISCAS
2008
IEEE

A hybrid CMOS APS pixel for wide-dynamic range imaging applications

13 years 10 months ago
A hybrid CMOS APS pixel for wide-dynamic range imaging applications
— In this paper, a new hybrid photodiode-photogate (HPDPG) CMOS APS pixel for high-dynamic range imaging applications is presented. The HPDPG pixel composes of a biased photogate, a photodiode and standard 3-transistors (3T) CMOS APS readout electronics. Biased photogate was connected in parallel with photodiode structure introducing a knee on the photoresponse curve. This new photodetection structure allows extension of the photoresponse range, providing wide dynamic range operation. New HPDPG pixel and a reference photodiode type 3T CMOS APS pixel were designed, fabricated, and tested using a 0.5µm double poly, triple metal (2P3M) CMOS process. It was shown that addition of a biased photogate structure in a standard photodiode type 3T CMOS APS pixel improve saturation exposure five times (5x) with the expense of reduced quantum efficiency, and increased dark current. Photogate in parallel with photodiode improves pixel full-well capacity ten times (10x) with the expected reduction...
Suat U. Ay
Added 31 May 2010
Updated 31 May 2010
Type Conference
Year 2008
Where ISCAS
Authors Suat U. Ay
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