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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
If the counter of Problem 5 were synchronous rather than asynchronous, what would be the longest delay time?
Problem 5
In the counter of Problem 4, assume that each flip-flop has a propagation delay from the triggering edge of the clock to a change in the Q output of 8 ns. Determine the worst-case (longest) delay time from a clock pulse to the arrival of the counter in a given state. Specify the state or states for which this worst-case delay occurs.
Problem 4
For the ripple counter in Figure 9–66, show the complete timing diagram for sixteen clock pulses. Show the clock, Q0 , Q1 , and Q2 waveforms.

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