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电压控制晶振荡器在直流电压参考验证中的应用
Matthew T Spidell1, Gaylon W Partain2, Alan G Jaffe1
1National Institute of Standards and Technology, Boulder, CO, United States of America.
Engineering research express
|April 10, 2025
概括
电压转换为频率转换提供了一种用于验证直流电压参考的新方法,绕过了重新校准的需要. 该技术使用电压控制振荡器来检测漂移,证明对远程或不可访问的系统有效.
科学领域:
- 电气工程 电气工程
- 计量学 计量学是一门学科.
- 仪器化 仪器化 仪器化
背景情况:
- 直流电压参考通常依赖于Zener二极管,容易漂移,需要根据主要标准进行重新校准.
- 重校准后勤是繁重的,特别是对于具有恒定功率要求或远程部署的系统.
- 使用本地Zener二极管的现有验证方法存在相关的衰老机制.
研究的目的:
- 引入和评估一项电压变频 (VFC) 转换技术,用于验证直流电压的参考漂移.
- 评估使用电压控制振荡器 (VCO) 独立于相关衰老的漂移检测的可行性.
- 确定基于VFC的精密仪器验证的长期稳定性和准确性.
主要方法:
- 采用商用电压控制的化晶振荡器 (VCOXO) 实现了一个VFC系统.
- 在258天的连续运行中监控振荡器稳定性,没有加速老化.
- 开发了一个基于2/3的数据的老化模型,并与剩余的数据进行验证.
主要成果:
- 长期漂移的VCOXO与一个权力法衰老模型是一致的.
- 对隔离数据的验证显示,模型与数据的差异为35ppm (35μV/V).
- 该VFC方法证明了在6.5位电压计类中支持仪器的潜力.
结论:
- 电压转换为频率转换提供了一种可行的,独立于物流的方法,用于验证直流电压的参考漂移.
- 使用VCOXO的VFC为传统重新校准方法提供了稳定而准确的替代方案.
- 这种技术特别适用于初级标准访问不切实际的系统,确保可靠的电压参考完整性.
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