The third counter starts counting in the first clock frequency when receiving the enabling signal, and stops counting when the enabling signal stops.
一比较器，接收上述第一计数器及上述第二计数器的计数值，以产生一致能信号输出；
The third counter starts counting in the first clock frequency when receiving the enabling signal, and stops counting when the enabling signal stops.
一比较器，接收上述第一计数器及上述第二计数器的计数值，以产生一致能信号输出；
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