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ECE 211
HW 19 SOLUTIONS p 1/10
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HW 19 SOLUTIONS
1.
A Moore circuit has two inputs A, B and two outputs Y, Z. The circuit waits for a complete pulse on
input A and then outputs one pulse; if B = 0, the pulse appears on the Y output, if B = 1 the pulse appears
on Z.
(a) Design a State Transition Diagram for this Moore circuit.
(b) How many flipflops do you need to realize your diagram?
Solution:
(a)
(b)
Four states, need
2 flipflops.
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HW 19 SOLUTIONS p 2/10
2.
A Moore circuit has two inputs A, B and one output Z. The circuit waits until a complete pulse arrives
on A and then outputs pulses until B = 1. A timing diagram example is:
Note that in this example, B becomes 1 when Z = 1. But your solution must also work if B becomes 1 when
Z = 0.
(a) Design a State Transition Diagram for this Moore circuit.
(b) How many flipflops do you need to realize your diagram?
Solution:
(a)
(b)
Four states, need
2 flipflops.
HW 19 SOLUTIONS p 3/10
3.
A Moore circuit has one input A and one output Z. The circuit waits until A = 1 and then outputs pulses
until A = 0. A timing diagram example is:
Note that in this example, A becomes 0 while Z = 1. But your solution must also work if A becomes 0
when
Z = 0.
(a) Design a State Transition Diagram for this Moore circuit.
(b) How many flipflops do you need to realize your diagram?
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This homework help was uploaded on 04/17/2008 for the course ECE 211 taught by Professor Nestor during the Fall '07 term at Lafayette.
 Fall '07
 nestor

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