用于IRFPA ROIC的高性能缓冲器模块的设计

发布时间：2018-04-15 16:42

本文选题：红外焦平面读出电路 + 缓冲器模块　；参考：《半导体光电》2017年04期

【摘要】：红外焦平面读出电路(IRFPA ROIC)主要用于焦平面阵列与后续信号处理之间的通信。文章提出了一种用于红外焦平面读出电路的缓冲器模块,包括列缓冲器、高性能的输出缓冲器以及相应的偏置电路。缓冲器均采用单位增益放大器结构,通过放大器的优化设计可实现对不同负载的有效驱动且静态功耗较低。该缓冲器模块用于一款640×512面阵、30μm中心距的中波红外焦平面读出电路,采用CSMC 0.5μm DPTM工艺进行流片加工。仿真结果表明,列缓冲器的开环增益为40.00dB,单位增益带宽为48.17MHz(10pF)。输出缓冲器可实现轨到轨的输入,开环增益为39.68dB,单位增益带宽为46.08 MHz,读出速率高达20 MHz,功耗为16.02 mW(25pF∥5.1kΩ)。该模块输入端拉出的测试管脚可在焦平面读出电路的晶圆测试中帮助验证芯片功能。通过调节测试端口,测试结果与仿真结果大体一致,验证了该缓冲器模块的设计可行。
[Abstract]:Infrared focal plane readout circuit (IRFPA ROI) is mainly used for communication between focal plane array and subsequent signal processing.This paper presents a buffer module for infrared focal plane readout circuits, including column buffers, high performance output buffers and corresponding bias circuits.The buffers all adopt the unit gain amplifier structure. By the optimization design of the amplifier, the effective drive for different loads can be realized and the static power consumption is low.The buffer module is used for a 640x512 array with 30 渭 m center distance in the middle wave infrared focal plane readout circuit. The flow sheet is processed by CSMC 0.5 渭 m DPTM process.The simulation results show that the open loop gain of the column buffer is 40.00dB and the unit gain bandwidth is 48.17MHz / 10pFN.The output buffer can realize the rail to rail input. The open-loop gain is 39.68 dB, the unit gain bandwidth is 46.08 MHz, the readout rate is up to 20 MHz, and the power consumption is 16.02 mW(25pF / 5.1 k 惟.The test pin pulled out at the input end of the module can help verify the chip function in the wafer test of the focal plane readout circuit.By adjusting the test port, the test results are in good agreement with the simulation results, and the design of the buffer module is proved to be feasible.
【作者单位】：中国科学院上海技术物理研究所中国科学院红外成像材料与器件重点实验室;中国科学院大学;
【分类号】：TN215

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