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Sequential Circuits

Sequential Circuits. Chapter 5. SR latch with NOR gates. latch with NAND gates. SR latch with control input. D latch. Flip-flops. SR master-slave flip-flop. Negative-edge-triggered D flip-flop. Positive-edge-triggered D flip-flop. Characteristic tables. SR flip-flop. D flip-flop.

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Sequential Circuits

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  1. Sequential Circuits Chapter 5

  2. SR latch with NOR gates

  3. latch with NAND gates

  4. SR latch with control input

  5. D latch

  6. Flip-flops SR master-slave flip-flop

  7. Negative-edge-triggered D flip-flop

  8. Positive-edge-triggered D flip-flop

  9. Characteristic tables • SR flip-flop • D flip-flop Can’t do “No Change”

  10. Sequential circuit analysis Eg.

  11. Example

  12. State diagram Mealy model Moore model

  13. Example

  14. A: 00 B: 01 C: 11 D: 10

  15. Sequential circuit design 1/0 0/0 A B C D 1/0 0/0 1/0 0/0 1/1 0/0 Eg. 序列中若出現“1101”就輸出“1” (如1010011100100101101101)

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