红外焦平面探测器数字读出电路研究

读出电路是红外焦平面探测器组件的重要组成部分,其性能对探测器乃至整个红外成像系统的性能有重大影响.随着硅CMOS工艺的发展,数字化读出电路以及读出电路片上数字信号处理等功能得以实现,能够大幅度提高红外焦平面探测器的性能.以红外焦平面探测器对读出电路的要求入手,分析了读出电路各性能参数对红外焦平面探测器性能的影响,介绍了读出电路的数字化技术及各种实现方式以及数字积分技术.CMOS技术的发展使得数字积分技术在红外焦平面探测器读出电路中得以实现,有效解决了读出电路的电荷存储容量不足的问题,极大地提高了探测器性能.

Study on Digital Readout Circuit for Infrared FPA Detectors

The readout integrated circuit (ROIC) is an important component for an infrared focal plane array detector, so its performance will largely affect the performance of the detector or even the whole imaging system. With the development of the silicon CMOS technologies, it is possible to digitize the signal and incorporate digital signal processing inside the ROIC. As a result, the performance of the IRFPA will be improved greatly. Based on the requirements of the IRFPA to ROIC, the influences of the ROIC to the IRFPA performance are analyzed. The digital ROIC techniques and digital integration techniques are introduced. The development of the CMOS technologies enables the digital integration technique, solving the problem of limited charge storage capacity and improving the IRFPA performance greatly.