干涉式大气垂直探测仪是风云4号气象卫星的重要有效载荷, 用于获取大气的多种三维信息。成功设计了一款适用于干涉式大气垂直探测仪的红外焦平面读出电路。电路采用CTIA注入级结构, 积分电容4档可选。并且工作方式灵活, 同时采用相关双采样结构有效地降低了电路输出噪声。电路使用CSMC 0.5 μm 2P3M 5 V工艺流片, 电路测试结果符合理论设计预期, 噪声小于0.14 mV, 动态范围达到85.6 dB。耦合中波HgCdTe探测器测试正常, 噪声小于0.43 mV, 动态范围达到75.6 dB, 符合干涉式大气垂直探测仪红外焦平面要求。

Geostationary Interferometric Infrared Sounder(GIIRS) is an important payload of the FY-4 meteorological satellite. It is used to obtain a variety of three-dimensional information of the atmosphere.An infrared focal plane array(IRFPA) readout integrated circuit(ROIC) for GIIRS was successfully designed in this paper. The circuit choosed CTIA as the input stage, and had four levels of charge capacity. The working modes is flexible, and the correlated double sampling (CDS) structure was used to reduce circuit′s output noise. The circuit was fabricated with CSMC 0.5 μm 2P3M 5 V process. The test results of the circuit have met the expectations of the design. The circuit′s output noise is lower than 0.14 mV, and dynamic range reaches 85.6 dB. The circuit has been hybridized to MWIR HgCdTe detector and the test results show that the IRFPA works normally. The IRPFA′s output noise is lower than 0.43 mV, and dynamic range is above 75.6 dB. The IRFPA meets the requirements of the GIIRS.