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光电编码器输出的脉冲需不需要接RC滤波电路?

Other Parts Discussed in Thread: TXB0106, TIDA-00176, AM26C32

在设计电机控制底板的时候,QEP电路在接收到光电编码器的脉冲信号后,经过了一个6N134的光耦,和74LS14的反相器,再接RC滤波传给DSP,请问,RC滤波电路一般情况下需要么?