现代电子技术2024，Vol.47Issue(8)：95-100,6.DOI:10.16652/j.issn.1004-373x.2024.08.015
一种高精度高稳定性的片内振荡电路设计
Design of a high precision and high stability on-chip oscillator circuit
宗佳佳 1黄坚 1来鹏飞 1李良1
作者信息
- 1. 无锡中微爱芯电子有限公司,江苏 无锡 214000
- 折叠
摘要
Abstract
As the clock source of the system,the frequency characteristics of the oscillation circuit can affect the operational performance of the chip.In order to improve the precision and the stability of on-chip oscillator output clock,an oscillation ciruit based on RC structure is designed.The bandgap reference is used in the oscillation circuit to generate capacitor charging current and reference voltage,and the mirror tube ratio is adjusted for the frequency coarse adjustment correction.By adjusting the reference voltage size and temperature coefficient,the frequency fine adjustment correction and temperature characteristic correction are achieved.The circuit is designed based on the 55 nm CMOS process,and the simulation results prove that,under typical conditions,the working output of the circuit is 30 MHz,with a 50%duty cycle clock.It operates within the range of 1.6 V to 5.5 V and-40℃to 125℃,with an oscillation frequency offset of 0.6%and a center calibration accuracy of 0.5%.The circuit can be used as a high-precision on-chip clock source or reference clock.关键词
振荡电路/RC结构/基准电路/频率校正/温度校正/校准精度/高稳定性Key words
oscillator circuit/RC structure/reference circuit/frequency correction/temperature correction/calibration accuracy/high stability分类
信息技术与安全科学引用本文复制引用
宗佳佳,黄坚,来鹏飞,李良..一种高精度高稳定性的片内振荡电路设计[J].现代电子技术,2024,47(8):95-100,6.
