一种新的红外焦平面阵列调整电路设计  

Design of skimming circuit for uncooled infrared detector

作　　者：陈力颖[1,2] 于文阳 任亚晶 CHEN Li-ying;YU Wen-yang;REN Ya-jing(School of Electronics & Information Engineering,Tianjin University of Technology,Tianjin 300387,China;Tianjin Key Laboratory of Photoelectric Detection Technology and System,Tianjin 300387,China)

机构地区：[1]天津工业大学电子与信息工程学院,天津300387 [2]天津市光电检测技术与系统重点实验室,天津300387

出　　处：《激光与红外》2020年第7期869-874,共6页Laser & Infrared

摘　　要：提出了一种新的红外焦平面阵列调整电路(skimming)设计。新的调整电路包括MEMS像元模块和非均匀性校正模块。该电路能够减少阈值电压对传统调整电路的影响,以及对探测器制造工艺引入的非均匀性进行补偿。MEMS像元模块通过控制明像元电路和盲像元电路中的电压值用于调节电路本身的非均匀性,同时非均匀性校正电路用以弥补探测器制造过程引入的像元电阻非均匀性。该电路应用于阵列为640×480的红外焦平面阵列上,采用TSMC 0.18μm工艺进行设计、仿真。仿真结果表明:MEMS像元模块能够使明像元电路和盲像元电路具有一致性;明像元电阻的非均匀性小于3%,最大积分电流失调为200 nA,非均匀性校正模块的补偿电流大于200 nA,符合设计要求,使得调整模块输出电流变大,积分电压变大,达到显示效果变亮的目的。A new design of infrared focal plane array skimming circuit is proposed.The new skimming circuit includes pixel module and non-uniformity correction module.The circuit can reduce the influence of threshold voltage on the traditional skimming circuit and compensate the non-uniformity introduced by the detector manufacturing process.The pixel module is used to adjust the non-uniformity of the circuit itself by controlling the voltage values in the active pixel circuit and the blind pixel circuit,while the non-uniformity correction circuit is used to compensate for the non-uniformity of pixel resistance introduced by the detector manufacturing process.The circuit is applied to an uncooled infrared detector with an array of 640×480,and is designed and simulated by TSMC 0.18μm process.The simulation results show that the pixel module can make the active pixel circuit and the blind pixel circuit consistent.The non-uniformity of the active pixel resistance is less than 3%,the maximum integral current offset is 200nA,and the compensation current of the non-uniformity correction module is greater than 200nA,which meets the design requirements,so that the output current of the skimming module becomes larger,the integral voltage becomes larger,and the display effect becomes brighter.

关 键 词：红外焦平面阵列 调整电路 MEMS像元 非均匀性 

分 类 号：TN432[电子电信—微电子学与固体电子学]