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.
出处
《固体电子学研究与进展》
CAS
CSCD
北大核心
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)
