A novel method to realize automatic gain adjust for infrared readout integrated circuit

被引：0
|
作者：
Dan, L [1 ]
Zhang, YC [1 ]
Chen, ZJ [1 ]
Zhao, BY [1 ]
Ji, LJ [1 ]
机构：
[1] Peking Univ, Inst Microelect, Beijing 100871, Peoples R China
来源：
2005 6th International Conference on ASIC Proceedings, Books 1 and 2 | 2005年
关键词：
CMOS; infrared EPA; ROIC; different gain choices;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A. novel method to adjust gain in CMOS infrared (IR) readout integrated circuit (ROIC) which is suitable for the application of small pixel size has been proposed in this paper. Current mirror is inserted in the pixel to adjust gain. Two comparators have been added outside of the pixel and provide the decision to select different gains. Adjustable gain makes the design of following signal process circuit easier and allows long integration time to increase SNR. With this method of automatic gain adjust, ROIC can deal with the current that varies from 40nA to 300nA, with the integration capacitor of 2pF and the integration time of 40 mu s. An experimental 4x4-pixel ROIC has been designed and it will be fabricated with 0.5 mu m DPDM n-well CMOS process.
引用
收藏
页码：401 / 404
页数：4
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