一种用于TCXO的三次函数电路设计  

A CMOS Third-Order Function Generator for a Temperature Compensated Crystal Oscillator(TCXO)

作　　者：肖鹏[1] 徐静平[1] 陈亮亮[1] 杨枫[1] 陈娟娟[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《微电子学与计算机》2009年第11期74-77,共4页Microelectronics & Computer

摘　　要：基于标准CMOS工艺设计了一个三次函数发生电路,该电路能产生一个与温度呈三次函数关系的电压来对晶体振荡器进行温度补偿.通过调整电路的参数,可以对不同型号的晶体振荡器进行精确的温度补偿.电路采用CSMC0.5μm CMOS工艺实现,电路结构简单,版图面积小,且功耗较低.补偿结果显示,在-35℃到85℃范围内,补偿后的晶体频率精度可以达到±1.5ppm.This paper presents an analog CMOS third-order function generator circuit. The circuit generates a cubic function that represents a quartz resonator＇s frequency versus temperature characteristic. Through adjusting the parameters of the cubic wave, a precise control can be done for variable quartz resonators. The design is implemented in CSMC 0.5μm technology, it has simple structure, with small layout area, and low power dissipation. The compensation result show that the temperature stability is better than ＋ 1.5ppm over - 30℃ to 85℃.

关 键 词：三次函数 温度补偿 CMOS工艺 

分 类 号：TN402[电子电信—微电子学与固体电子学]