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
    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
    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

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

    Retired Moderator

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