抑制背景电流的红外焦平面单元读出电路

Readout circuit of infrared focal plane unit for restraining background current

随着非制冷红外焦平面阵列技术的发展,红外读出电路的设计变得越来越重要。设计了一种带有背景电流抑制功能的红外焦平面单元读出电路,该读出电路在改进后的第一代开关电流电路的基础上实现背景电流抑制功能。详细阐述了该系统电路的整体架构和工作原理,并用Spectre仿真软件实现了电路的仿真。结果表明该方案可以抑制背景电流,实现红外读出功能。

With the development of uncooled infrared focal plane array technology,the design of infrared readout circuit becomes more and more important. A readout circuit of infrared focal plane unit with suppression of the background current was designed. Based on the first generation of SI circuit,the readout circuit was improved and realized the suppression of the background current. The overall architecture and working principle of the system circuit are explained in detail,and the circuit was simulated by Spectre software. Results show that the scheme can suppress background current and realize infrared readout function.