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本文介绍研制混合式红外焦平面阵列方面的新成果,注意力集中在利用与电荷耦合器件(CCD)多路传输器源耦合的背照射InAsSb和HgCdTe光伏探测器的混合式焦平面阵列。用实验论证了输入电路,电荷撇取和电荷分配的背景抑制能力。介绍了有关均匀性方面的数据以及MOS场效应晶体管(MOSFET)输入的阈电压与温度的关系,此关系与理论上的计算值很一致。本文还讨论了与混合式红外焦平面阵列有关的几种噪声问题。对有反馈放大器的源耦合输入电路的噪声进行了分析,结果表明:虽然增加了两个新的噪声源,但是此电路工作的噪声能比单一源耦合输入电路的噪声更小。为了进一步了解焦平面的工作,已经制作了一个与实验数据极一致的噪声性能模型。最后,讨论了混合式焦平面阵列的性能。
This article describes new developments in hybrid infrared focal plane arrays with a focus on hybrid focal plane arrays that utilize back-illuminated InAsSb and HgCdTe PV detectors coupled to a charge-coupled device (CCD) multiplexer source. Experiments demonstrate the input circuit, charge skimming, and chargeback background suppression. The data on uniformity and the threshold voltage of MOS field effect transistor (MOSFET) inputs are introduced as a function of temperature, which is in good agreement with the theoretical calculations. This article also discusses several noise issues associated with hybrid infrared focal plane arrays. The noise of the source-coupled input circuit with a feedback amplifier is analyzed. The results show that although two new noise sources are added, the noise of this circuit is less than that of a single source coupled input circuit. In order to further understand the work of the focal plane, a noise performance model that is very consistent with experimental data has been produced. Finally, the performance of the hybrid focal plane array is discussed.