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文中介绍了一种新型的128×128红外读出电路中的低功耗设计,包括像素级和列读出级两部分。在像素级设计中,提出了一种新型四像素共用反馈放大器(Quad-Share BufferedInjection,QSBD I)的结构:每个像素的平均功耗为500nW,放大器引入的功耗降低了30%,同时使像素FPN只来源于局部失配。列读出级采用新型主从两级放大列读出结构,其中主放大器完成电荷到电压的转换,从放大器驱动输出总线来满足一定的读出速度。通过SPICE仿真发现,与传统列电荷放大器结构相比,新型结构可节省60%的功耗。
This paper introduces a new 128 × 128 infrared readout circuit in low power design, including the pixel level and column readout level of two parts. In the pixel-level design, a novel quad-shared BufferedInjection (QSBD I) architecture is proposed: the average power consumption per pixel is 500nW and the power consumption introduced by the amplifier is reduced by 30% The pixel FPN only comes from the local mismatch. The column read-out stage uses a novel master-slave readout architecture with two stages of amplification, where the main amplifier completes the charge-to-voltage conversion and drives the output bus from the amplifier to meet a certain readout speed. Through SPICE simulation found that, compared with the traditional column charge amplifier structure, the new structure can save 60% power consumption.