红外与毫米波学报2020，Vol.39Issue(3)：324-330,7.DOI:10.11972/j.issn.1001-9014.2020.03.010
一种像素级源跟随管共享的双列线信号传输的红外焦平面读出电路新结构
A readout structure with double column buses and shared source follower for IRFPAs
摘要
Abstract
A new readout circuit structure for infrared focal plane array with pixel-level shared source followerand double column buses is proposed in this paper. The voltage signal of the pixel is transferred through double column buses instead of single column bus,and therefore the non-uniformity and non-linearity caused by the para-sitic resistor of the column bus is eliminated. By sharing the source follower within four adjacent pixels in the same column,the aspect ratio(W/L)and area of the source follower are increased to suppress the thermal noise, flicker noise and non-uniformity caused by process. A 640×512 readout circuit using this structure is designed and fabricated in 0. 35μm 2P3M CMOS process and the pixel pitch is 15μm. The test results indicate the readout cir-cuit receives a high dynamic range(DR)of 81dB high-quality infrared images with a low power consumption of 30mW. The nonlinearity is 0. 11％,and the non-uniformity is less than 1％. Medium-wave infrared detector as-sembly is fabricated and tested. The assembly' s non-uniformity is less than 5％ and the NETD is 18mK. High-quality infrared images are obtained.关键词
红外焦平面/读出电路/源跟随管共享/双列线Key words
IRFPA/ROIC/shared source follower/double column buses分类
信息技术与安全科学引用本文复制引用
牛育泽,朱雅珺,鲁文高,顾雨婷,张雅聪,陈中建..一种像素级源跟随管共享的双列线信号传输的红外焦平面读出电路新结构[J].红外与毫米波学报,2020,39(3):324-330,7.基金项目
Supported by the National Natural Science Foundation of China(61973008,61976009) （61973008,61976009）
