1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

CprE logic gate problem, possibly unsolvable

  1. Nov 8, 2012 #1
    1. The problem statement, all variables and given/known data


    I was having a casual chat with one of my professors and he presented me with a problem that after 4 hours of attempting I believe is unsolvable. the set up is pretty simple.

    you have 3 inputs x,y,z that go into a system, the output is ~x,~y,~z. However you are only allowed to use 2 inverters.

    I can get very close but there are a few instances where I cant get things to jive, specifically where x=0 y=0 and z=0.

    Basically I want to know if this problem is solvable, I have looked into quantum gates to see if there is some way to hybrid this but my knowledge of them is limited.
     
  2. jcsd
  3. Nov 9, 2012 #2

    NascentOxygen

    User Avatar

    Staff: Mentor

    Other gates are allowed, but no more than 2 can be inverting?
     
  4. Nov 10, 2012 #3
    that is correct
     
  5. Nov 10, 2012 #4

    NascentOxygen

    User Avatar

    Staff: Mentor

    So I'd just use an exclusive-OR to perform inversion. Done! :wink:
     
  6. Nov 10, 2012 #5
    A XOR gate is a inversion gate so I still run into the same problem how would you do this?
     
  7. Nov 12, 2012 #6

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    This probably counts as a spoiler..

    http://www2.engr.arizona.edu/~srini/papers/Srini-Pulse-Inverter.pdf [Broken]

    :-)
     
    Last edited by a moderator: May 6, 2017
  8. Nov 17, 2012 #7

    NascentOxygen

    User Avatar

    Staff: Mentor

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: CprE logic gate problem, possibly unsolvable
  1. Logic Gates (Replies: 1)

  2. Logic Gates (Replies: 8)

  3. Logic Gates (Replies: 26)

Loading...