Switching 4-Signal Souces using 4016 TDM

Discussion in 'General Electronics Chat' started by vinodquilon, Jun 15, 2010.

  1. vinodquilon

    Thread Starter Member

    Dec 24, 2009
    234
    0
    See the attachment...
    http://www.postimage.org/image.php?v=PqO6sj9

    It presents switching of 2 sources using CMOS CD4016 Analog Switch into a single channel.

    My question is, how can I switch 4 sources using a 'single clock'.

    Here is my 'complex' interpretation,
    Use clock to run one mod-4 asynchronous counter with outputs Q0, Q1.
    Then construct one 'logic circuit' to drive 4016 according to the truth table given in the

    attachment.

    Can anybody suggests some easy tricks ?
     
  2. n1ist

    Active Member

    Mar 8, 2009
    171
    16
    That would work. Look into the CD4017 or CD4022 for your counter.
    /mike
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Depending on your sources, you would want to replace the 4016 with a 4066. The 4066 has the same functions, but is somewhat improved over the 4016.
     
  4. rogs

    Active Member

    Aug 28, 2009
    279
    37
    Either use 4 outputs from a 4017, as suggested by n1ist, with each output driving an individual 4016 switch (or better still a 4066 as beenthere suggests).

    If you do use a binary counter, just use a 4051 instead of a 4066. That will allow you to select up to one of eight inputs, with just a 3 bit address. no further address decoding 'logic' required.
     
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