Question

An edge-triggered flip-flop $F_1$ has setup and hold times of $t_s$ and $t_{\mathrm{h}}$, respectively. The flip-flop $F_2$ is constructed by adding a delay of $t_{\mathrm{d}}$ to the data input of $F_1$. (Consider a delay to be a buffer with $t_{\mathrm{pd}}=t_{\mathrm{cd}}=t_{\mathrm{d}}$.) What are the setup and hold times of $F_2$ ?

   An edge-triggered flip-flop $F_1$ has setup and hold times of $t_s$ and $t_{\mathrm{h}}$, respectively. The flip-flop $F_2$ is constructed by adding a delay of $t_{\mathrm{d}}$ to the data input of $F_1$. (Consider a delay to be a buffer with $t_{\mathrm{pd}}=t_{\mathrm{cd}}=t_{\mathrm{d}}$.) What are the setup and hold times of $F_2$ ?

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Computation Structures

Computation Structures

Stephen A Ward,… 1st Edition

Chapter 4, Problem 3

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Step 1

In this case, the data input change will take $t_d$ time to propagate through the delay buffer and reach the input of $F_1$. Therefore, the setup time for $F_2$ is $t_s + t_d$. Show more…

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An edge-triggered flip-flop $F_1$ has setup and hold times of $t_s$ and $t_{\mathrm{h}}$, respectively. The flip-flop $F_2$ is constructed by adding a delay of $t_{\mathrm{d}}$ to the data input of $F_1$. (Consider a delay to be a buffer with $t_{\mathrm{pd}}=t_{\mathrm{cd}}=t_{\mathrm{d}}$.) What are the setup and hold times of $F_2$ ?

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