摘要: |
针对某产品差动放大电路共模抑制比超差问题,从理论上进行了深入分析,并推导出电阻阻值变化、电容容值变化、共模干扰输入、共模干扰输出之间存在函数关系,提出了不同的解决方案。结合该产品特点选择了一种方案,成功解决了此超差问题。 |
关键词: 差动放大;阻容;匹配 |
基金项目: |
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Research and Application of Resistance-capacitance Matching inDifferential Amplifier |
Tang Hui Fan Hebin Qu Ruxiang Zhang Junbo
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Hongfeng Control Company of The Sanjiang Space Group, Xiaogan 432000
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Abstract: |
According to differential amplifier circuit CMRR out-of-tolerance in a product, the paper analyzes the problem deeply in theory, and draws the function containing the following variables:resistance, capacitance, common-mode interference, and the effect of common-mode interference. In addition, it provides several solutions for the problem. Finally, the problem is solved by one of the methods above successfully. |
Key words: differential amplifier;resistance and capacitance;matching |