MOSFET输出电容非线性对振荡器工作状态影响  

The Affect of the Non-linearity of a MOSFET Output-Capacitance on the Operating States and the Efficiency of the Oscillator

作　　者：刘平[1] 曾波[1] 刘晓芳[1] 宋慧娜[1] 

机构地区：[1]郑州大学,河南郑州450052

出　　处：《电力电子技术》2007年第8期96-98,共3页Power Electronics

基　　金：国家自然科学基金资助(10275021)~~

摘　　要：由于MOSFET漏源极间的非线性寄生电容,也即输出电容Co的存在会影响振荡器的工作状态及效率。因此,构建了包含非线性电容的振荡电路模型,并以ARF461A射频功率MOSFET为例,用Matlab分析了非线性电容Co对振荡器的工作状态及其效率的影响。实验结果与理论分析保持了很好的一致性。理论分析和实验均表明,利用Co的非线性,可以提高振荡器的工作效率。The parasitic parameter of MOSFET can influence the performance of oscillator.Fnr example,the exis- tence of the parasitic capacitance （output-capacitance Cα） between drain electrode anti source elec.trude can influence the operation states and the efficiency of the oscillator,and Cα. has non-linear property.The waveforms of the oscillator are non-sinus because of the non-lineanity of Cα,a circuit model containing a non-linear capacitance is structured and the ef fect of non-linear capacitance on the operation states and the efficiency is analyzed with matlab,which is proved by ex periment.The efficiency of oscillator is increased by means of the non-linearity of Cα.

关 键 词：振荡器 晶闸管/金属氧化物半导体场效应晶体管 

分 类 号：TN75[电子电信—电路与系统]