| 摘要 |
PURPOSE:To improve the detecting accuracy of a sequence fault and also to use just a single detection system by detecting instantaneously the spot and dropout phenomena of an optional phase of a polyphase clock. CONSTITUTION:A discriminating means 20 confirms the signals allocated out of a clock sequence means 10 for each input of clocks Cj (j=1,...,n) of a single phase. then it is checked whether or not said confirmed signals are equal to those signals allocated to the clocks Cj of the corresponding phases, i.e., the signals given from output terminals k.n+j (k=0.1,...,i-1) of the means 10. If it is decided by the means that the signals allocated out of the means 10 to clocks Cj are not equal to those given from the terminal k.n+j, a sequence fault is detected with a polyphase clock.
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