一种高精度时钟产生电路的设计  

Design of High-Precision Clock Generation Circuit

作　　者：张琦[1] ZHANG Qi

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2020年第2期117-121,共5页Modern Navigation

摘　　要：通过数字逻辑校准电路模块和电流镜阵列对环形振荡器的输入电流及充放电电流进行调整与控制,设计了一种频率为2MHz的高精度时钟产生电路,其具有时钟输出稳定性高、校准速度快,且电路结构简单的特点。采用SMIC 0.18μm工艺,在不同的工艺角及温度下对本电路进行了仿真,结果表明在以上各种仿真情况下时钟频率误差最大在±1%以内,且从开始校准到校准完成,最大所需时间不超过400μs。With the digital logic calibration circuit module and current mirror array adjusting and controlling the input current and charge and discharge current of the ring oscillator, this paper designs a high precision clock generating circuit with a frequency of 2 MHz, which has the characteristics of high stability, fast calibration and simple circuit structure. The circuit is simulated with smic0.18 um technology. The results show that the error of the clock frequency is within 1%, and the maximum time is less than 400μs.

关 键 词：高精度 时钟产生电路 频率校准 环形振荡器 

分 类 号：TN953[电子电信—信号与信息处理]