+ Post New Thread
Results 1 to 5 of 5
  1. #1
    Advanced Member level 3
    Points: 4,968, Level: 16
    Achievements:
    7 years registered

    Join Date
    Jan 2012
    Location
    Italy
    Posts
    863
    Helped
    40 / 40
    Points
    4,968
    Level
    16

    Common centroid matching array

    Dear friends,

    I have question about the common centroed matched array. I have this array for example to match two transistors A and B

    ABBA
    BAAB
    ABBA
    BAAB


    or I can make it

    ABBA
    BAAB



    for sure the first array is supposed to be the best but during work I see it is consuming a lot of wiring which I think it will add considerable parasatics.
    The second array is working fair but it has a problem with big transistors in which dividing them by 4 is not enough. Therefore I have two options in which I want to take your opinion on

    the first is extending the array horizontally like this way

    ABBA ABBA
    BAAB BAAB

    or I keep using the

    ABBA
    BAAB but using two gate per unit transistor in the array

    Which one you think it match better ?

    Thank you in advance

    •   AltAdvertisement

        
       

  2. #2
    Member level 2
    Points: 1,080, Level: 7

    Join Date
    Oct 2014
    Posts
    51
    Helped
    3 / 3
    Points
    1,080
    Level
    7

    Re: Common centroid matching array

    In my opinion, the second placement is good enough. It's simple for wiring and still get matching for A, B transitor.
    There will be trade off when we choose too complex placement. Like wiring complexibility, parasitic resitor and capacitor...


    1 members found this post helpful.

    •   AltAdvertisement

        
       

  3. #3
    Advanced Member level 3
    Points: 4,968, Level: 16
    Achievements:
    7 years registered

    Join Date
    Jan 2012
    Location
    Italy
    Posts
    863
    Helped
    40 / 40
    Points
    4,968
    Level
    16

    Re: Common centroid matching array

    Thank you quyla for your answer



    •   AltAdvertisement

        
       

  4. #4
    Advanced Member level 3
    Points: 4,968, Level: 16
    Achievements:
    7 years registered

    Join Date
    Jan 2012
    Location
    Italy
    Posts
    863
    Helped
    40 / 40
    Points
    4,968
    Level
    16

    Common centroid array arrangement

    Dear friends,

    what is the difference between the two below arrays in term of better matching

    ABBA
    BAAB

    and

    ABAB
    BABA

    Thank you



  5. #5
    Member level 2
    Points: 1,080, Level: 7

    Join Date
    Oct 2014
    Posts
    51
    Helped
    3 / 3
    Points
    1,080
    Level
    7

    Re: Common centroid matching array

    The second is seems better for matching when it has better common centroid.
    One more thing is the number finger of A and B in the second configuration should be even for abut.



--[[ ]]--