摘要
为了减少NMOS开关阈值电压变化引起的信号失真,设计了一种适用于低压开关电容电路的体效应补偿开关,并利用该电路实现了一阶非反相开关电容(SC)低通滤波器。基于0.5μm标准CMOS工艺(Vtno=0.7 V,Vtpo=1.0 V)的SPICE仿真和总谐波失真(THD)的仿真结果表明:该电路具有很好的线性特性,采用该电路能够达到更优越的性能。
Aimed at reducing distortion due to the threshold voltage variations of an NMOS switch, the paper introduces the design of a body effect compensated switch applicable to low voltage switched capacitor circuits. The simulation using SPICE, based on 0.5 μm standard CMOS technology （ Vtno =0. 7 V, Vtpo = 1.0 V） indicates that the better performance of the total harmonic distortion （THD） is attributed to the use of the designed circuit in a first-order non-inverting switched-capacitor （SC） low pass filter.
出处
《黑龙江科技学院学报》
CAS
2006年第3期189-192,共4页
Journal of Heilongjiang Institute of Science and Technology
基金
厦门市科技计划项目资助(3502Z20031089)
关键词
体效应补偿
低压
开关电容电路
body effect compensated
low voltage
switch-capacitor circuits
