Responsibility cycle: Obligation cycle of the clock is outlined given that the fraction of a interval of clock through which the clock is in lively state. Responsibility cycle of a clock is normally expressed to be a percentage. As an illustration, figure beneath reveals a clock possessing an active point out of '1' stays minimal for 2 ns through its time period of ten ns. It's, as a result, reported to own a responsibility cycle of 20%.How responsibility cycle impacts timing: Responsibility cycle of clock plays a big job in timing closure of styles. We must think about next aspects connected to responsibility cycle variation whilst timing.
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50 % cycle timing paths: If you'll find both equally favourable and detrimental edge-triggered flip-flops in the structure, obligation cycle in the clock issues a good deal. For instance, if we've a clock of 100 MHz with 20% responsibility cycle; For any timing route from optimistic edge-triggered flip-flop to destructive edge-triggered flip-flop, we get only two ns for set up timing for positive-to-negative route and 8 ns for negative-to-positive route compared to ten ns for just a entire cycle route. Nonetheless, if your exact same clock experienced responsibility cycle of 50%, we might have gotten 5 ns for your very same 50 % cycle timng route.
Minimal pulse width needs: At high frequencies, obligation cycle issues quite a bit. For example, just about every sequential ingredient has necessity of minimum amount pulse width that should achieve it. When the obligation cycle of your clock is not really near 50%, we are restricted in offering significant frequency although we've been capable of assembly timing at even greater frequencies. Allow us take an instance. In the event the minimum amount pulse width requirement of the flip-flop is five hundred ps, then with 50% duty cycle clock, we are able to make use of a clock of one GHz (one ns clock period of time). However, if we utilize a clock of duty cycle of 20%, we simply cannot utilize a clock higher than four hundred MHz.
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