CMOS logic for sine wave?

Discussion in 'General Electronics Chat' started by KCHARROIS, Oct 30, 2013.

  1. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
    292
    1
    Hello,

    Is there such an IC or discrete cmos circuit that will allow me to pass or block a sine wave signal from going through depending if another pin is high or low?

    Thanks
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    4066 analog switch
     
  3. WBahn

    Moderator

    Mar 31, 2012
    17,715
    4,787
    What do you mean by "block a sine wave signal"? Do you mean block a signal at a certain frequency? Do you mean block a sine wave signal but let signals other than sine waves pass?

    Please be more specific.
     
  4. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
    292
    1
    Pretty much what MikeML gave is exactly what I need. So a logic 1 or 0 to to allow a signal to go through doesn't matter on frequency.
     
  5. rogs

    Active Member

    Aug 28, 2009
    279
    37
    The 4066 that Mike ML suggests will do exactly as you ask.

    As an alternative, you might like to check the 4051 mulitplexer series as well?

    Same function as the 4066 - A logic 'hi' or 'lo' to control an analogue signal path.
    It does however also include the facility to allow a single positive voltage control signal (0v and +5V for example) to control a 'bipolar' analogue signal (+5 to -5V p-p for example).
    The 4066 does not permit an analogue signal below or above the DC logic control levels

    That can be useful when any associated op amp circuitry is supplied with a positive and negative supply...
     
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