一种极低功耗CMOS运算放大器设计  

A Ultra-low Power CMOS Operational Amplifier

作　　者：马松[1] 滕南君 耿卫东[1] 

机构地区：[1]南开大学微电子工程系,天津300071

出　　处：《南开大学学报（自然科学版）》2016年第4期29-32,共4页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：高等学校博士学科点专项科研基金(20130031120034)

摘　　要：提出了1种两级结构极低功耗CMOS共源共栅运算放大器,电路采用了体驱动技术,其主要MOS管工作在亚阈值状态.采用SMIC 0.18μm CMOS工艺进行设计,Spectre仿真结果表明,电路稳定工作电压可低至0.5 V,工作电流小于0.2μA,功耗小于0.1μW,开环增益为90.3 d B,单位增益带宽为3.2 k Hz.A two-stage CMOS operational amplifier is designed. Bulk-driven technique is considered,and its main working MOS transistors are in weak inversion region. The amplifier is implemented based on SMIC 0.18 μm process and simulated by Spectre, the simulation results show that its supply voltage can be down to 0.5 V, the supply current is less than 0.2 μA, and the power consumption is lower than 0.1μW. And the ultra-low power amplifier has a DC gain of 90.3 d B, a unity gain bandwidth of 3.2 k Hz.

关 键 词：体驱动 运算放大器 极低功耗 

分 类 号：TN402[电子电信—微电子学与固体电子学]