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选型问题，现有逆变器上有一个将电压转换成频率的芯片，这个信号出来不知道咋测了，有频率还原成电压的芯片吗
VFC320，既可以实现V-F转换，也可以实现F-V 转换：
http://www.ti.com/lit/ds/symlink/vfc320.pdf”
