一款多色叠层量子阱红外探测器的读出电路设计

一款完整的红外焦平面探测器主要包含探测器件、读出电路、封装结构和制冷组件。目前根据不同应用场景,探测波段范围不断变宽、探测灵敏度需求提高、成像速度要求加快,对探测器设计提出了更严格、更复杂的指标要求。其中,读出电路将探测光信号转换为电信号传输至系统,是探测器组件的关键核心模块。本文设计了一款对应多色叠层量子阱型器件的红外焦平面探测器读出电路,能够实现同时间、同空间对四波段信号进行探测,并且同时读出,四波段信号的探测积分与读出之间没有互相干扰。探测器规格640×512,像元间距50μm(四波段),各波段信号可实现分时积分、分别可调,采用边积分边读出工作模式,读出帧频可达到四波段探测时≥50 Hz,电路噪声≤05mV,动态范围≥70dB,电功耗≤600mW,是一款超大规模低噪声高帧频的高性能读出电路。

A read out circuit design of a multi color stacked quantum well infrared detector

A complete infrared detector consist a detection device,readout circuit,and package structure and refrigeration component.At present,according to different application scenarios,the detection band range is constantly widening,the detection sensitivity needs to be improved,and the imaging speed requirements are accelerated,which put forward stricter and more complex index requirements for detector design.Among them,the readout circuit converts the detection optical signal into an electrical signal for transmission to the system,and is the key core module of the detector component.In this paper,an infrared focal plane detector reading circuit corresponding to a multicolor laminated quantum well device is designed,which is capable of detecting four band signals at the same time and read them out at the same time,and there is no mutual interference between the detecting integrals of the four band signals and the readout.The detector specification is 640×512,with a range of 50μm,the signal of each band can be achieved by time integration,respectively adjusted.Adopting the work mode of integrating while reading out,the readout frame frequency can reach ≥50 Hz in four band detection,the circuit noise ≤0.5 mV,the dynamic range ≥70 dB,power consumption ≤600 mW,which is an ultra large scale,low noise,high frame frequency,high performance readout circuits.