CS223  FALL 2009
Homework #5
Due Monday November 16, 2009 by 16:00
in the Computer Eng. Dept. office (put into CS223 box)
[Remember to put your name (and your partner’s name if you choose to work
with a homework partner), along with your student ID (s) and section number(s),
in the upper right hand corner of each page.”Note: if you attend a different lab
section from the CS223 section you are registered in, please also write your lab
section # on the paper in the top right along with your name.”]
1 Derive the state diagram and characteristic equation of the latch circuit in
the Fig P1.
2 Construct the state diagrams and write characteristic equations for the fol
lowing:
(a) D flipflop
(b) SR flip flop
(c) JK flip flop
3 Derive the state table and state diagram of the sequential circuit in Fig P3.
What is the function of the circuit?
4 A sequential circuit has two JK flip flops A and B and one input x and output
Z. The circuit is described by the following input equations:
JA
=
x
KA
=
B
JB
=
x
KB
=
A
Z
=
xB
(a) Derive the state equations A(t+1),B(t+1)
(b) Draw the state diagram of the circuit
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 Fall '09
 MehmetBaray
 partner, Fig P5

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