Serial Adder Subtractor

Discussion in 'Homework Help' started by maryrose0911, Jan 29, 2014.

  1. maryrose0911

    Thread Starter New Member

    Jan 29, 2014
    How will you construct and test a serial adder-subtractor circuit using JK flip-flop and shift registers? Thank you in advance :)
  2. MrChips


    Oct 2, 2009
    This sounds more like a homework question so I have moved it to the Homework Help forum.
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
    you dont say how many bits, or who to control the add / subtract.
    one way is do a serial to paralell conversion, run the paralell trough a 74181 ( one for each 4 bits needed) and back to serial. the 74181 will add subrtract, shift and many other functions.
  4. WBahn


    Mar 31, 2012
    You need to show YOUR best effort to do YOUR homework. That will allow us to see what your approach is, what you are getting right, and where you are going off the rails. We can then offer suggestions to get you back on the right track.

    The first step is you have to have a clear understanding of what the objective is at a level of detail that will let you draw a timing diagram showing all of the signals and what should happen at each clock pulse.