T flip flop circuit, MMExer5.8

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Discussion in 'Homework Help' started by PG1995, Jan 17, 2012.

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  1. Jan 17, 2012 #1
    PG1995

    Thread Starter Well-Known Member

    Apr 15, 2011
    813
    6
    Hi

    Please have a look on the attachment. Please help me with the query there. Thanks a lot.

    Regards
    PG
     
    #1 Reply
  2. Jan 17, 2012 #2
    Zazoo

    Member

    Jul 27, 2011
    114
    43
    It's still a counter, it just doesn't cover the full-count. If the device ends up in state 11 (by a glitch) then it just resets.
     
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  3. Jan 17, 2012 #3
    PG1995

    Thread Starter Well-Known Member

    Apr 15, 2011
    813
    6
    Thank you.

    Okay. That means full count could be from 00, 01, 10, 11, but it doesn't cover the last value. By the way, what kind of glitch that could be?

    Best regards
    PG
     
    #3 Reply
  4. Jan 17, 2012 #4
    Zazoo

    Member

    Jul 27, 2011
    114
    43
    ESD is one way that a circuit could end up in an invalid/unused state. Typically you want these unused states to simply transition back to reset (00).
     
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  5. Jan 17, 2012 #5
    PG1995

    Thread Starter Well-Known Member

    Apr 15, 2011
    813
    6
    Thank you for the information.

    Best regards
    PG
     
    #5 Reply
  6. Jan 26, 2012 #6
    PG1995

    Thread Starter Well-Known Member

    Apr 15, 2011
    813
    6
    Hi

    Please have a look on the attachment. Please check if the part (a) is correct, and please answer the questions related to part (b) so that I can proceed to implement the function. Here is the scan from the solution manual (to someone who doesn't know, it has been found that mostly solution manual gives wrong solution). Thank you very much.

    Regards
    PG
     
    Last edited: Jan 26, 2012
    #6 Reply
  7. Jan 26, 2012 #7
    Georacer

    Moderator

    Nov 25, 2009
    5,159
    1,273
    Part a is correct.

    Your assessments are correct. When we use the summing symbol Σ, we refer to the SoP form, whereas the multiplication symbol Π, refers to the PoS form.
     
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  8. Jan 26, 2012 #8
    PG1995

    Thread Starter Well-Known Member

    Apr 15, 2011
    813
    6
    I'm sorry to ask this again. So, is it really so, F'(A,B,C,D)=Ʃ(3,8,12,15), for the the function F in the attachment. Thanks.

    Best regards
    PG
     
    #8 Reply
  9. Jan 26, 2012 #9
    Georacer

    Moderator

    Nov 25, 2009
    5,159
    1,273
    Yes, F'=Σ(3,8,12,15), for part b.
     
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