新型低功耗128×128红外读出电路设计  

Low Power Design of 128×128 IR ROIC

作　　者：刘丹[1] 鲁文高[1] 陈中建[1] 吉利久[1] 赵宝瑛[1] 

机构地区：[1]北京大学信息科学技术学院微电子学系,北京100871

出　　处：《激光与红外》2007年第5期449-451,456,共4页Laser & Infrared

摘　　要：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。Low power design of 128 × 128 IR ROIC has been introduced in this paper, including the design of pixel and column readout stage. A novel low power quad-share buffered injection （QSBDI） pixel structure has been proposed. The average power of QSBDI is 500nW and the power is saved about 30%. FPN is also reduced to the order of local threshold voltage offset. In the design of column readout stage, master and slaver structure has been adapted, where master amplifier converts charge to voltage, and slave amplifier works with standby mode to drive output bus. SPICE simulation shows the power has been reduced about 60%.

关 键 词：红外读出电路 低功耗 四像素共用反馈放大器 主从两级放大 

分 类 号：TN492[电子电信—微电子学与固体电子学]