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Sequential Design

EMT 221 Digital Principles II. Sequential Design. Examples. Flip-Flop Characteristic Table. Flip-Flop Excitation Tables. Examples Using D-Flip-flop. Example 1. D-Flip-flop. From State Table  Derive Equation. Q(t). Q(t+1). Then.. Produce the Schematic. Example 2. D-Flip-flop.

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Sequential Design

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  1. EMT 221 Digital Principles II Sequential Design Examples

  2. Flip-Flop Characteristic Table

  3. Flip-Flop Excitation Tables

  4. Examples Using D-Flip-flop

  5. Example 1 D-Flip-flop

  6. From State Table  Derive Equation Q(t) Q(t+1)

  7. Then.. Produce the Schematic

  8. Example 2 D-Flip-flop

  9. State table for Circuit of Fig 4.18

  10. The Flip-flop Input Equations DA = (AX +BX) Equations for FF inputs DB = A.X Y = ( A+B ) . X - Equation for output Y • Subscripts A and B: names of FF outputs.

  11. How to derive the flip-flop output equations as well as for output Y?

  12. Two-Dimensional State Table for the Circuit in Figure 4.18

  13. Example 2: D Flip-flop Design DA = (AX +BX) DB = A.X Y = ( A+B ) . X

  14. Example 3 D-Flip-flop

  15. State Diagram for Design Example

  16. State Table for Design Example

  17. Maps for Input Equations and Output Y

  18. Logic Diagram for Sequential Circuit with D Flip-Flops

  19. Example 4 D-Flip-flop

  20. State Table

  21. Maps for Simplifying Input Equations

  22. The sCheMatiC…

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