help multisim

Discussion in 'Homework Help' started by daoud, Jun 23, 2010.

  1. daoud

    Thread Starter New Member

    Jun 23, 2010
    how to build a circuit that receivec a binary number (N) and square wave with cycle time ( t ) , and the output is square wave with cycle time (N*t) ??
  2. retched

    AAC Fanatic!

    Dec 5, 2009
    Are you using a uC or discrete parts?
  3. Georacer


    Nov 25, 2009
    I've got an idea!
    Use a counter (ie 74ls191) and feed it the clock. Take its output and compare ot with your input. Make a signal (use gates or a comparator) that responds to this equality and feed it to the load command input of the counter. Have the counter load the number 15 (by raising its input pins high).
    As a result, your counter will start counting from 15 until the number you have given it (15,0,1,2...). Each time it overflows it will produce a pulse at the ripple clock output. Use this output for your new clock.
    Refer to the 74191 datasheet for more information.