What is the maximum frequency of operation, Computer Engineering

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For the circuit demonstrated below, what is the Maximum Frequency of Operation? Are there any hold time violations for FF2? When yes, how do you modify the circuit to ignore them?

2425_Maximum Frequency of Operation.png

For demonstrated figure in above:

The minimum time period = 3+2+(1+1+1) = 8ns

Maximum Frequency = 1/8n= 125MHz.

And there is a hold time violation into the circuit, due to feedback, when you observe, tcq2+AND gate delay is less than thold2, to ignore this we require to use even number of inverters (buffers). Now this time we require using 2 inverters each along with a delay of 1ns. After that the hold time value accurately meets.


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