74LS74产生方波

74LS74是一个双D触发器芯片，通过将其中一个D触发器的输出端Q非端连接到输入端D，并接入时钟信号，可以实现二分频的功能。将同一片74LS74上的两个D触发器串联起来，可以实现四分频电路。每两个时钟脉冲，D触发器的输出就会产生一个完整的方波。因此，利用74LS74芯片可以方便地实现方波的生成。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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