红外与毫米波学报, 2018, 37 (3): 257, 网络出版: 2018-07-30
短波红外InGaAs线性焦平面数字化输出研究
Digital output for short-wave infrared InGaAs linear FPA
短波红外 线列256×1铟镓砷焦平面 模数转化器 逐次逼近 hort-wave infrared 256×1 InGaAs FPA ADC successive approximation register SAR
摘要
提出了一种适用于短波红外铟镓砷线性焦平面的数字化输出研究.针对实验室自主研制出的短波红外256×1铟镓砷焦平面, 结合SAR ADC的基本原理, 以高分辨率、低功耗、小面积为设计原则, 设计一款逐次逼近(SAR)模数转换器.ADC采用0.18 μm CMOS工艺流片, 采用3.3 V电压供电, 采样率235 KS/s, 功耗460 μW, 信噪比66.6 dB.将ADC芯片与256×1铟镓砷焦平面在变积分时间条件下进行耦合测试.结果表明ADC芯片可以满足短波红外线列256×1铟镓砷焦平面的应用需求.
Abstract
A specific digital output research on short-wave infrared InGaAs linear focal plane array (FPA) was reported. Coupled with a laboratory self-designed short-wave infrared 256×1 InGaAs FPA, a successive approximation register (SAR) analog to digital convertor (ADC) with high resolution, low power consumption and small size was designed and fabricated in 0.18 μm CMOS process. The chip consumes 460 μW at a sampling rate of 235 KS/s with the power supply of 3.3 V. The signal to noise ratio (SNR) of the ADC chip is 66.6 dB. The ADC chip was also tested at different integral time to convert the 256×1 InGaAs FPA signal. The results show that the ADC chip can meet the application requirements of the 256×1 InGaAs FPA.
魏杨, 王绪泉, 黄张成, 黄松垒, 方家熊. 短波红外InGaAs线性焦平面数字化输出研究[J]. 红外与毫米波学报, 2018, 37(3): 257. WEI Yang, WANG Xu-Quan, HUANG Zhang-Cheng, HUANG Song-Lei, FANG Jia-Xiong. Digital output for short-wave infrared InGaAs linear FPA[J]. Journal of Infrared and Millimeter Waves, 2018, 37(3): 257.