红外与毫米波学报2024，Vol.43Issue(2)：268-278,11.DOI:10.11972/j.issn.1001-9014.2024.02.017
高光谱应用的带可调复位时间CDS的低噪声红外焦平面读出电路
Low noise ROIC integrated with correlated double sampling with adjustable intervals for hyperspectral applications
吴双 1梁清华 2陈洪雷 2丁瑞军2
作者信息
- 1. 中国科学院上海技术物理研究所 红外成像材料与器件重点实验室,上海 200083||中国科学院大学,北京 100049
- 2. 中国科学院上海技术物理研究所 红外成像材料与器件重点实验室,上海 200083
- 折叠
摘要
Abstract
Low noise is a key requirement of readout integrated circuit(ROIC)in hyperspectral applications for its low radiation.Correlated double sampling(CDS)is commonly used to suppress noise.In this paper,CDS is improved by adjusting the time interval between the clamp and sample-and-hold(SH),which can filter low-fre-quency noise flexibly.A 640×512,15 μm pixel pitch ROIC is designed and fabricated in 180 nm CMOS pro-cess.The input stage consists of low-noise capacitive trans-impedance amplifier(CTIA)and CDS with adjustable intervals(AICDS).A timing generator is proposed to extend the CDS reset time from 0 to 270 clock cycles.By extending the reset time to decrease the time interval,the noise electrons are significantly decreased from 39 e-to 18.3 e-.The SPECTRE simulation and the experimental results corroborate that the proposed structure AICDS can optimize noise performance of hyperspectral ROIC,thus can be widely used.关键词
高光谱成像/读出电路/可调时间间隔/CTIA/CDS/低噪声Key words
hyperspectral imaging/readout integrated circuit(ROIC)/adjustable interval/capacitive trans-impedance amplifier(CTIA)/correlated double sampling(CDS)/low noise分类
数理科学引用本文复制引用
吴双,梁清华,陈洪雷,丁瑞军..高光谱应用的带可调复位时间CDS的低噪声红外焦平面读出电路[J].红外与毫米波学报,2024,43(2):268-278,11.
