uit below the propagation delay of the flipflops may vary betwcen 4 and 7 ns whi

Question

uit below the propagation delay of the flipflops may vary betwcen 4 and 7 ns while on delay of the gates may vary between 2 and 6 ns. Calculate the minimum propmum propagation delays from each of A and C to cach of P. Q and R nd S. maximum propagation delays from the and the 1D 1D C1 the circuit below the setup and hold times of the lipflops are 5 ns and 1 ns respectively propagation delay of the flipflops may vary between 4 and 7 ns while the propagation delay of the gates may vary between 2 and 6 ns. Calculate the minimum and the maximum propagation delays between C and U. Hence calculate the maximum frequency of the clock, C. 1D C1

Explanation / Answer

2).

Minimum propagation delay to reach P = 4 = 4ns

Maximum propagation delay to reach P = 7 = 7ns

Minimum propagation delay to reach Q = 4+2 = 6ns

Maximum propagation delay to reach Q = 7+6 = 13ns

Minimum propagation delay to reach R = 4+2 +4= 10ns

Maximum propagation delay to reach R = 7+6 +7= 20ns

Minimum propagation delay to reach S = 4+2 +4 + 2= 12ns

Maximum propagation delay to reach S = 7+6 +7 + 4= 24ns

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