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How to build a signal alternater

  1. Dec 6, 2007 #1
    Suppose I have 2 input signals V1 and V2,
    And I want my output signal to alternate from V1 to V2 and so on at a particular frequency.
    Any idea what components can help me to achieve this goal??

    Thank you
  2. jcsd
  3. Dec 6, 2007 #2


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    Depending on the voltages of V1 and V2, you might want to look into bilateral switches. The 4016 is a MOS quad bilateral switch.
  4. Dec 7, 2007 #3


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    Staff: Mentor

    Are V1 and V2 DC signals? If so, you just make a square wave generator circuit, with an adjustable high value and adjustable low value (or adjustable amplitude and adjustable offset)....
  5. Dec 7, 2007 #4


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    Analog switches and relays would be the obvious choices.

    - Warren
  6. Dec 9, 2007 #5
    Thanks for the suggestions
  7. Dec 11, 2007 #6
    Sounds like a multiplexer

    A 2:1 multiplexer will have 2 inputs, a select line, and a single output. The output will be the selected input: that is, if there is a logic "0" (ground) on the select line, the output will be input 0, and if there is a logic "1" on the select line the output will be input 1. There are different types of multiplexers--don't use a digital MUX if your inputs are not logic values (I presume they are not, or you would not have asked the question).

    This way, whatever your inputs are--DC, AC, audio, etc--you can alternate between them at a desired frequency simply by applying the desired frequency to the select line.
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