[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5369/JSST.2012.21.1.7

Dual Sampling-Based CMOS Active Pixel Sensor with a Novel Correlated Double Sampling Circuit

Jo, Sung-Hyun (School of Electronics Engineering, Kyungpook National University)
Bae, Myung-Han (School of Electronics Engineering, Kyungpook National University)
Jung, Joon-Taek (School of Electronics Engineering, Kyungpook National University)
Choi, Pyung (School of Electronics Engineering, Kyungpook National University)
Shin, Jang-Kyoo (School of Electronics Engineering, Kyungpook National University)

Publication Information

Journal of Sensor Science and Technology / v.21, no.1, 2012 , pp. 7-12 More about this Journal

Abstract

In this paper, we propose a 4-transistor active pixel sensor(APS) with a novel correlated double sampling(CDS) circuit for the purpose of extending dynamic range. Dual sampling techniques can overcome low-sensitivity and temporal disparity problems at low illumination. To accomplish this, two images are obtained at the same time using different sensitivities. The novel CDS circuit proposed in this paper contains MOS switches that make it possible for the capacitance of a conventional CDS circuit to function as a charge pump, so that the proposed APS exhibits an extended dynamic range as well as reduced noise. The designed circuit was fabricated by using $0.35{\mu}m$ 2-poly 4-metal standard CMOS technology and its characteristics have been evaluated.

Keywords

Dual Sampling; APS; Noise; Charge Pump;

Citations & Related Records

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