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介绍了320×288红外(IR)读出电路(ROIC)中列读出级的低功耗设计。采用新型的主从两级放大的列读出结构和输出总线分割技术相结合。其中主放大器完成电荷到电压的转换,从放大器完成对输出总线的驱动来满足一定的读出速度,总线分割是把320列分组来减少输出总线上的负载电容。通过spice的仿真可以发现,与传统的列读出级相比,这种新型结构的功耗由原来的47mW降到了现在的6·74mW,节省了80%以上的功耗。
The low power consumption design of the column readout stage in the 320 × 288 IR readout circuit (ROIC) is introduced. Using a new type of master and slave amplification of the column read out of the structure and the combination of output bus. The main amplifier to complete the charge-to-voltage conversion, completed from the amplifier to drive the output bus to meet a certain read speed, the bus is divided into 320 columns to reduce the output bus load capacitance. The spice simulation shows that the power consumption of this new architecture has dropped from 47mW to the current 6.74mW, saving more than 80% of the power consumption compared with the traditional column readout.