摘要
设计了RC充电时间过零点不变性振荡器,该振荡器提供对电压和温度不敏感的高精度高稳定性时钟信号。分析并推导了RC充电过程中过零电压的时间不随电源电压变化的特性,采用温度补偿技术最大限度地保证了RC充电过程中过零电压的时间不随温度变化。基于180 nm工艺实现了该振荡器,仿真结果表明,该振荡器可以稳定输出2 MHz,电压从2.5 V~5.5 V的频率波动小于1%,温度从-40℃~125℃的频率波动小于1%,PVT条件下的最大电流不超过150μA。
A RC charging time zero crossing invariant oscillator is designed to provide high precision and high stability clock signals insensitive to voltage and temperature.This paper analyzes and deduces the characteristics that the time of zero crossing voltage does not vary with the power supply voltage in the process of RC charging,and adopts the temperature compensation technology to ensure that the time of zero crossing voltage does not vary with the temperature to the maximum extent.The simulation results show that the oscillator can output 2 MHz stably,the frequency fluctuation from 2.5 V to 5.5 V is less than 1%,the temperature fluctuation from-40℃to 125℃is less than 1%,and the maximum current under PVT condition is less than 150μA.
作者
袁珩洲
桑浩
颜广达
冯军
梁斌
郭阳
YUAN Heng-zhou;SANG Hao;YAN Guang-da;FENG Jun;LIANG Bin;GUO Yang(College of Computer Science and Technology,National University of Defense Technology,Changsha 410073;College of Intelligent Science,National University of Defense Technology,Changsha 410073,China)
出处
《计算机工程与科学》
CSCD
北大核心
2023年第1期10-16,共7页
Computer Engineering & Science
基金
国家自然科学基金(62104257)
国防科技大学校科研基金(ZK21-34)
国防科工重点实验室基金(WDZC20215250110)。
关键词
RC充电时间过零点不变性
高精度
高稳定
振荡器
RC charging time zero crossing invariance
high precision
high stability
oscillator
