| 摘要 |
Line sync and frame sync signals detecting circuit of MAC signal is disclosed in which D flip-flops for sequentially inputting the line synchronous signals are connected to one another, complimental outputs of the D flip flops are connected to exclusive-OR gates and the outputs of the exclusive-OR gates are connected to an AND gate to form a uncorrelator, the uncorrelator is connected to one input of the AND gate, the output of the exclusive-OR gate is connected to the other input of the AND gate, a 1H delay line is connected to the one input of the exclusive-OR gate, the output of the AND gate and the output of a 2H delay line are connected to a NOR gate, the output of the AND gate and the output of the 1H delay line are connected to an OR gate, thereby easily detecting the line sync signal and frame sync signal using the logic gates.
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