An Adaptive Integration Time CMOS Image Sensor With Multiple Readout Channels

作     者：Qian, Xinyuan Yu, Hang Chen, Shoushun Low, Kay Soon 

作者机构：Nanyang Technol Univ Sch Elect & Elect Engn VIRTUS IC Design Ctr Excellence Singapore 639798 Singapore Nanyang Technol Univ Sch Elect & Elect Engn Satellite Res Ctr Singapore 639798 Singapore 

出 版 物：《IEEE SENSORS JOURNAL》 (IEEE Sensors J.)

年 卷 期：2013年第13卷第12期

页      面：4931-4939页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0804[工学-仪器科学与技术] 0702[理学-物理学] 

基　　金：Nanyang Assistant Professorship [M58040012] ACRF Project [M52040132] 

主　　题：CMOS image sensor adaptive integration time multiple readout channels high dynamic range (HDR) wide dynamic range (WDR) star tracker 

摘      要：In this paper, we present an adaptive integration time CMOS image sensor with multiple readout channels for star tracker application. The sensor architecture allows each pixel to have an adaptive integration time. Through cyclically selecting a row of pixels and checking the integration voltage of each pixel, brighter pixels can be marked and readout first. Those dimmer pixels will continue integration until their voltage fall into a window defined by two threshold voltages. Each pixel only consists of five transistors. To improve the readout throughput and hence to reduce the rolling time, a multiple readout channel architecture is proposed. A proof-of-concept 320 x 128-pixel image sensor was implemented using Global Foundries 0.18 mu m mixed-signal CMOS process.