| 零点漂移在差分放大电路中的影响分析 |
| The Impact Analyses of Zero Drift in Differential Amplifier Circuit |
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| 中文摘要: |
| 在模拟电路设计中，零点漂移是直接耦合放大电路存在的一个特殊问题。本文结合工程应用案例，介绍了AD620仪表放大器零点漂移引发的问题，指出其形成原因，进行了影响分析，通过对滤波电容的不同选择，得出了共模抑制比对零点漂移的影响。本文可以为实际可能出现的采集精度超差等问题进行避免，并对故障分析提供一定的参考和依据。 |
| 英文摘要: |
| In analog circuit design, the zero drift is a special problem of direct coupling amplifier circuit. Combining with engineering application cases, the paper introduces the problems caused by amplifier AD620 instrument zero drift, points out its forming reason, and analyzes the influence. Through the selection of different filer capacitances, it concludes the influence of the common-mode rejection ratio on the zero drift. This article can offer reference for the actual possible acquisition to avoid the issues such as difference of ultra-precision, and provide some reference and basis for fault analysis. |
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| 中文关键词: 零点漂移 差分放大 共模抑制 |
| 英文关键词:zero drift differential amplifier common-mode rejection |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2017.05.12 |
| 引用本文：张艳秋.零点漂移在差分放大电路中的影响分析[J].计测技术,2017,37(5):51~52. |
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