4. Given a 100-MHz clock signal, derive a circuit using D flip-flops to generate 50-MHz and 25-MHz clock signals. Draw a timing diagram for all three clock signals, assuming reasonable delays.
4. Given a 100-MHz clock signal, derive a circuit using D flip-flops to generate 50-MHz and 25-MHz clock signals. Draw a timing diagram for all three clock signals, assuming reasonable delays.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Please do question 4

Transcribed Image Text:3. Show a circuit that implements the gated SR latch using NAND gates only
4. Given a 100-MHz clock signal, derive a circuit using D flip-flops to generate 50-MHz and 25-MHz clock
signals. Draw a timing diagram for all three clock signals, assuming reasonable delays.
5. An SR flip-flop is a flip-flop that has set and reset inputs like a gated SR latch. Show how an SR flip-
flop can be constructed using a D flip-flop and other logic gates.
6. The gated SR latch in Figure 5.5a (from Text (Brown), reproduced below) has unpredictable behavior if
the S and R inputs are both equal to 1 when the Clk changes to 0. One way to solve this problem is to create
a set-dominant gated SR latch in which the condition S = R = 1 causes the latch to be set to 1. Design a set-
dominant gated SR latch and show the circuit.
DT
R
Clk
S
Clk
R
0
R'
(a) Circuit
CIK S R
0
1
1
1
1
X
0
0
1
1
X
0
1
0
1
Q(1+1)
Q(1) (no change)
Q(1) (no change)
0
1
X
(b) Characteristic table
7:
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