Concepedia

A wide dynamic range CMOS image sensor with an adjustable logarithmic response

Hsiu-Yu Cheng, Bhaskar Choubey, Steve Collins

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2008 · 22 citations · 11 references

DOI

Concepts

Abstract

A wide dynamic image CMOS image sensor with a user adjustable logarithmic photo-response is presented. A pMOS switch and a time-dependent reference voltage are integrated into a three-transistor (3T) pixel structure to implement a logarithmic response. Several pixels have been manufactured using a 0.25μm standard CMOS technology. Compared to the conventional logarithmic response pixel based on a diode-connected transistor, the proposed pixel combines a wide dynamic range of 120dB with much higher responsivity (250mV/decade) and better dark response.

References

11

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P.M. Acosta-Serafini, I. Masaki, C.G. Sodini · IEEE Journal of Solid-State Circuits · 2004 · 69 citations

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A Novel Logarithmic Response CMOS Image Sensor With High Output Voltage Swing and In-Pixel Fixed-Pattern Noise Reduction

Luhua Lai, Ching‐Ming Lai, Ya‐Chin King · IEEE Sensors Journal · 2004 · 62 citations

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A Wide-Dynamic-Range CMOS Image Sensor Based on Multiple Short Exposure-Time Readout With Multiple-Resolution Column-Parallel ADC

Masaaki Sasaki, Mitsuhito Mase, Shoji Kawahito et al. · IEEE Sensors Journal · 2007 · 59 citations

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