数字像元红外读出电路的比较器设计  

Comparator design of digital pixel infrared readout circuits

作　　者：李晓飞 袁媛[1] 喻松林[1,2] LI Xiao-fei;YUAN Yuan;YU Song-lin(North China Research Institute of Electro-Optics,Beijing 100015,China;National Key Laboratory of Infrared Detection(Beijing Research Center),Beijing 100015,China)

机构地区：[1]华北光电技术研究所,北京100015 [2]红外探测全国重点实验室(北京研究中心),北京100015

出　　处：《激光与红外》2025年第3期382-387,共6页Laser & Infrared

摘　　要：红外探测器通常需要通过延长积分时间来积累更多红外信号,这就会使得传统的模拟域读出电路积分电容过早饱和,数字像元读出电路能够很好地解决该问题。目前脉冲频率调制型A/D转换结构被广泛应用于像素级ADC方案。比较器作为脉冲频率调制型A/D转换单元的重要组成部分,其性能表现直接影响ADC的性能。本文设计了一款带有迟滞功能的比较器,应用于数字像元红外读出电路,具有低噪声、低功耗的特点,基于0.18μm CMOS工艺进行设计,通过仿真验证,与设计目标相比具有较好的符合度。Infrared detectors often need to accumulate more infrared signals by extending the integration time,which can make the integration capacitor of the traditional analogue domain readout circuit saturate prematurely,and digital pixel readout circuits can effectively solve this problem.Currently,pulse frequency modulation-based A/D conversion structure is widely used in pixel-level ADC solutions.As an important component of pulse frequency modulation-based A/D conversion units,the performance of comparators directly affects the performance of ADCs.In this paper,a comparator with hysteresis function is designed for digital pixel infrared readout circuits with low noise and low power consumption.The design is based on 0.18μm CMOS process,and verified by simulation to have a good degree of conformity compared with the design objectives.

关 键 词：数字像元 红外读出电路 低功耗 迟滞比较器 

分 类 号：TN215[电子电信—物理电子学] TN491