Question

In: Electrical Engineering

Design an up/down counter with four states (0, 1, 2, 3) using clocked JK flip flops....

Design an up/down counter with four states (0, 1, 2, 3) using clocked JK flip flops. A control signal x is used as follows: When x = 0 the machine counts forward (up), when x = 1, backward (down). Simulate using MultiSim and attach a simulation printout.

Please address the following:

  1. State Table
  2. State Diagram
  3. Flip Flop Excitation Tables
  4. K-Map Simplification and Resulting Diagram
  5. MultiSim Simulation

Solutions

Expert Solution

EXCITATION TABLE OF JK FLIP FLOP

Q

Q+

J

K

0

0

0

X

0

1

1

X

1

0

X

1

1

1

X

0

STATE TABLE

PRESENT STATE

INPUT

NEXT STATE

JK FLIP FLOP INPUTs

Q1

Q0

X

Q1+

Q0+

J1

K1

J0

K0

0

0

0

0

1

0

X

1

X

0

0

1

1

1

1

X

1

X

0

1

0

1

0

1

X

X

1

0

1

1

0

0

0

X

X

1

1

0

0

1

1

X

0

1

X

1

0

1

0

1

X

1

1

X

1

1

0

0

0

X

1

X

1

1

1

1

1

0

X

0

X

1


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