How to turn D Latch to D Flip-flop?

Discussion in 'Homework Help' started by TheRiverRamones, May 5, 2008.

  1. TheRiverRamones

    Thread Starter New Member

    May 5, 2008
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    My problem is to implement a solution that changes D latch to D Flip-Flop, using simple logic, and present the circuit that comes with this solution. Can you help me?

    PS: If it's not the right place, move it, i'm new in the forum.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    A latch is simply an enable signal and a D input. A flip-flop adds SET and RESET inputs, and so becomes more complex.

    Have you got the logic for the latch function yet?
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    on the clock input of the D latch place an AND gate with two inputs (say A nad B). Connect A to three NOT gates in series and then connect the input of the last NOT gate in the tail to B. use B as your clock input. This is for a positive edge. For a negative edge replace the AND gate with a NOR.
     
  4. Caveman

    Active Member

    Apr 15, 2008
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    Technically, SET and RESET inputs are not required for a flip-flop. They are just typically there.
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Ok, probably not necessary. I was just looking at the internal logic for a 74LS75 and a 74LS74.
     
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