A numerical analysis of a CMOS image sensor with a simple fixed-pattern-noise-reduction technology

被引：14

作者：

Yonemoto, Kazuya ^{[1
]}

Sumi, Hirofumi ^{[1
]}

Ohba, Yoshikazu ^{[1
]}

Kawarada, Hiroshi ^{[1
]}

机构：

[1] DI Department, Sony Corporation, Shinagawa INTERCITY C Tower, 2-15-3, Konan, Minato-ku, Tokyo 108-6201, Japan

来源：

Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers | 2002年 / 56卷 / 04期

关键词：

Amplification - Image sensors - Noise abatement - Threshold voltage - Transistors;

D O I：

10.3169/itej.56.670

中图分类号：

学科分类号：

摘要：

A 1/3-inch 640 × 480-pixel CMOS image sensor was developed using a simple fixed-pattern-noise-reduction technology with a five-transistor pixel circuit and a low input-voltage I-V converter. In this report, we show the effectiveness of a low input-voltage I-V converter with a current-mirror circuit in improving the amplification ratio and linearity of a pixel circuit. The dependence of the pixel signal characteristics on the parameters of the pixel transistors was also analyzed. In a five-transistor pixel circuit, the threshold voltage of the X-Y addressing transistor affects the amplitude and level of the readout pulse. This report also contains analysis of the mechanism of the X-Y addressing transistor, illustrating the concept behind the selection of the threshold voltage.

引用

页码：670 / 678

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