激光红外主被动像素读出电路设计
Design of Pixel Readout Circuit for Active Laser and Passive Infrared Detection
叶茂 1冯书涵 1赵毅强 1郑肖肖 1李尧1
作者信息
- 1. 天津大学微电子学院,天津 300072;天津市成像与感知微电子技术重点实验室,天津 300072
- 折叠
摘要
提出一种面向激光红外主被动探测的像素电路设计,其中像元中心距为30 μm.所设计电路中引入了直流电流(DC)消除反馈回路,提高了激光探测灵敏度,并结合脉冲宽度调制技术,实现了红外成像动态范围扩展.电路采用互补金属氧化物半导体(CMOS)180 nm工艺进行设计与验证,在激光探测模式下,可消除DC大小高达5.3 μA,并且能实现0.5 μA的幅值灵敏度和2.3 ns的脉冲宽度灵敏度;在红外成像模式下,传统高增益和低增益工作模式的动态范围分别为65.3 dB、69.1 dB,脉冲宽度调制技术可将动态范围扩展60 dB.
Abstract
A pixel circuit design for active laser and passive infrared detection is proposed.The pixel center distance is 30 μm.The direct current(DC)elimination feedback circuit is introduced to improve the laser detection sensitivity,and the pulse-width modulation technology is combined to achieve the dynamic range extension of infrared imaging.The circuit is designed and verified using a 180 nm complementary metal-oxide-semiconductor(CMOS)process.In laser detection mode,the eliminated DC reaches up to 5.3 μA,the amplitude sensitivity is 0.5 μA,and the pulse width sensitivity is 2.3 ns.In the infrared imaging mode,the dynamic range of the traditional high-and low-gain modes are 65.3 dB and 69.1 dB,respectively.Pulse width modulation technology can extend the dynamic range by 60 dB.
关键词
激光红外/主被动探测/像素电路/直流电流消除/脉冲宽度调制Key words
laser and infrared/active and passive detection/pixel circuit/direct current elimination/pulse width modulation引用本文复制引用
基金项目
"慧眼行动"成果应用转化项目(62402210207)
出版年
2024
NETL
NSTL
万方数据