| 基于RC充电时间过零点不变性的高精度高稳定振荡器 |
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| 引用本文： | 袁珩洲,桑浩,颜广达,冯军,梁斌,郭阳.基于RC充电时间过零点不变性的高精度高稳定振荡器[J].计算机工程与科学,2023,45(1):10-16. |
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| 作者姓名： | 袁珩洲 桑浩 颜广达 冯军 梁斌 郭阳 |
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| 作者单位： | （1.国防科技大学计算机学院，湖南 长沙 410073;2.国防科技大学智能科学学院，湖南 长沙 410073） |
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| 基金项目： | 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） |
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| 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。
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| 关 键 词： | RC充电时间过零点不变性 高精度 高稳定 振荡器 |
| 收稿时间： | 2022-09-13 |
| 修稿时间： | 2022-10-28 |
A high precision and high stability oscillator basedon RC charging time zero crossing invariance |
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| YUAN Heng-zhou,SANG Hao,YAN Guang-da,FENG Jun,LIANG Bin,GUO Yang.A high precision and high stability oscillator basedon RC charging time zero crossing invariance[J].Computer Engineering & Science,2023,45(1):10-16. |
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| Authors: | YUAN Heng-zhou SANG Hao YAN Guang-da FENG Jun LIANG Bin GUO Yang |
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| Affiliation: | （1.College of Computer Science and Technology,National University of Defense Technology,Changsha 410073;
2.College of Intelligent Science,National University of Defense Technology,Changsha 410073,China） |
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| Abstract: | 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 150 μA. |
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| Keywords: | RC charging time zero crossing invariance high precision high stability oscillator |
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