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LM331转换电路，那个环节对温度最敏感
根据输出电压的公式，可以看到是和RL，Rs，Rt Ct 密切相关的，所以这些电阻电容器件尽量选择精度比较高，温漂比较低的器件。
7脚输入电压大于6.2V时 ，频率非线性变换，什么原因呢
