Pulse and Digital Circuits

18.6 THE PROCEDURE TO DESIGN COUNTERS

The major in the design of counters is briefly described here:

• The statement of the problem or the state diagram will be given.
• Identify the number of flip-flops required.
• Choose the type of flip-flop needed.
• Assign variable names to the flip-flops.
• Draw the state table.
• Develop the excitation table.
• Use a K-map to derive the logic equations.
• Implement a counter to produce the specified sequence of states.

This design procedure can be further understood with the help of the following example.

FIGURE 18.24 A state diagram

EXAMPLE

Example 18.4: Design a 3-bit binary counter whose state diagram is shown in ...