1. Limited time only! Sign up for a free 30min personal 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!

Encrypting sequential circuit

  1. Nov 25, 2011 #1
    I'm new, forgive me.
    1. The problem statement, all variables and given/known data
    The transmitter has one input (X) on which information bits are fed to the unit. It has one output (Z) on which the encrypted bit stream appears.
    Operation:
    (a) Initially the output Z is equal to the value of the input bit.
    (b) After the pattern 111 occurs in the input, the output becomes equal to the complement of the input bit until the pattern 000 occurs.
    (c) Once the pattern 000 occurs in the input, the output becomes equal to the input bit until the pattern 111 occurs.

    (b) and (c) continue for as long as bits are received.

    Example:
    X = 0 1 1 0 1 1 1 0 0 1 1 1 1 1 0 0 0 1 1 1 0 1 1 1 1 0 1 1 0
    Z = 0 1 1 0 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 0 0 1

    I need to make a moore circuit using JK flip flops

    2. Relevant equations



    3. The attempt at a solution
    I can't figure out how I'm supposed to make b and c continue for as long as bits are received....
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted