Pierce晶体振荡器电路的起振点分析  

Start-up Condition Analysis in Pierce Crystal Oscillator Circuit

作　　者：孔令荣[1] 熊立志[1] 王振华[1] 

机构地区：[1]深圳市远望谷信息技术股份有限公司,深圳518057

出　　处：《计算机与数字工程》2010年第5期135-138,142,共5页Computer & Digital Engineering

摘　　要：利用负阻分析方法,得到使Pierce晶体振荡器电路起振的环路增益范围和最优起振点,并分析了起振点处的偏置电流以及最低起振电压。最后以10MHz晶体振荡器电路设计为例,在180nm CMOS工艺下,通过Hspice仿真验证理论分析的正确性。The start-up condition in Pierce crystal oscillator circuit is analyzed.By means of the theory of negative resistance,the value range and its optimization of the loop gain in Pierce crystal oscillator circuit is deduced.Furthermore,the bias current and the lowest voltage limitation of power supply are analyzed when the oscillator is starting up.Finally,an optimum 10-MHz Pierce crystal oscillator circuit based upon the 180nm CMOS technology is described and simulated by Hspice.As a result,the correctness of the theoretical analysis is verified.

关 键 词：晶体振荡器 负阻 起振条件 跨导 

分 类 号：TN752[电子电信—电路与系统]