摘要
针对短波红外焦平面阵列探测器弱信号耦合、高帧频输出和噪声抑制的要求,文中设计了512×256面阵探测器读出电路(ROIC)的高帧频模拟信号链路结构。完整的模拟信号链包含运放积分型(CTIA)单元输入级、相关双采样、电荷放大器和互补型输出级。在低温模型基础上,进行了前仿真和提取版图寄生参数的后仿真。仿真得到输出动态范围为2.8V,8路输出的工作帧频高于250Hz。基于CSMC-6S05DPTM0.5μm工艺完成流片,读出电路ROIC芯片的测试结果与仿真结果基本一致,为短波红外焦平面探测器弱信号读出提供了有效的设计选择。
High- frequency analog chain of 512í256 staring short wavelength （SW） infrared- focal- plane-arrays（IRFPAs） readout- integrated circuit（ROIC）, focusing on coupling of weak signal, high- frame output and noise depression was implemented in this paper. The complete analog signal chain contained a novel input stage of capacitor feedback transimpedance amplifier （CTIA） preamplifier, a correlated double sampling （CDS） module,an amplifier of charge and complementary output stage. The simulation and verification were carried out both before and after completing the layout. The circuit’s structure was analyzed according to low- temperature model. The result shows that the output dynamic range is 2.8 V and the frame rate is above 250 Hz with output of 8 channels . The CTIA ROIC chip fabricated with CSMC - 6S05DPTM 0.5 μm process technology is measured and proved to be consistent with the simulation.
出处
《红外与激光工程》
EI
CSCD
北大核心
2014年第5期1370-1374,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(10990104)
