我使用一个CD4013B(双D触发器)搭建了一个二分频电路,两路输入方波的相位差90度,但是分频后的两路方波输出相位差却不是90度,请问这是什么原因?输入是由OPA2211构成的过零比较器产生的两路正交方波信号。
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