Conversion of 1 flip flop to another

Discussion in 'Homework Help' started by lamborg, Nov 16, 2012.

  1. lamborg

    Thread Starter New Member

    Nov 16, 2012
    So I am just learning this stuff and here is something that I don't understand.

    While converting 1 ff to another lets say SR to JK, we first draw the table as:

    J K | Qn Qn+1 | S R

    What I am not understanding is this Qn+1
    How do I fill in this Qn+1 forum? It doesn't appear to be adding 1 to Qn, neither it is JKQn +1.

    Can someone help me with filling this table? I think then I will be able to figure the Kmap.
  2. tshuck

    Well-Known Member

    Oct 18, 2012
    This may be of some help...
  3. WBahn


    Mar 31, 2012
    Think of it as

     Q_n \text{ and } Q_{n+1}

    Or as

    Q(n) and Q(n+1)

    In either case, they are referring to the PRESENT value and NEXT value of Q, respectively.

    You will often see the notation Q and Q' to mean the same thing. Yes, this can be confusing since Q' is also frequently used to mean NOT(Q). You will learn how to pick the intended meaning from context (and even be right the vast majority of the time!).