一种低功耗的增益自举型C类反相器及其应用  

An Ultra-low-power Gain-boost Class-C Inverter and Its Application

作　　者：曹天霖[1] 罗豪[1] 梁国[1] 韩雁[1] 

机构地区：[1]浙江大学信电系微电子与光电子研究所,杭州310027

出　　处：《固体电子学研究与进展》2012年第4期392-397,共6页Research & Progress of SSE

基　　金：国家教育部博士点基金资助项目(20100101110063)

摘　　要：提出了一种创新的增益自举型C类反相器。这种C类反相器的两输入管大部分时间工作在亚阈值区,使其能够代替传统的运算放大器来实现低功耗。采用增益自举技术显著提高了C类反相器的直流增益,采用片上体偏置技术减小了制造工艺和电源电压对C类反相器的不利影响。同时在SMIC0.13μm CMOS工艺下实现了基于这种C类反相器的开关电容积分器和音频ΣΔ调制器芯片。A novel gain-boost class-C inverter is presented. Both input transistors of the class-C inverter mostly operate in the sub-threshold region, and thus the inverter can replace traditional OTA （Operational Transconductance Amplifier） to realize low power consumption. A gain-boost technique is adopted to increase the inverter DC-gain, and an on-chip body bias technique is proposed to improve the adverse effect of process and supply voltage variations within the inverter. Based on the proposed class-C inverter, a switched-capacitor integrator and an audio ΣΔ modulator chip are implemented in 0.13 μm CMOS technology.

关 键 词：C类反相器 增益自举 片上体偏置 积分器 ΣΔ调制器 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN76