help me about multiplexers

Discussion in 'Homework Help' started by srimathy, Aug 25, 2006.

  1. srimathy

    Thread Starter New Member

    Aug 24, 2006
    hi,i just want to know the basic theory behind using a multiplexer.where do we use it?what r the uses of it?
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    "Multi" means "many" and "plex" means "rooms" or "spaces." In our use it means "uses." A Multiplexer lets one conductor path act as though it were many conductor pathways. A multiplexer is a "signal selector," or a "digital switchboard." We can use a digital adress to select which of several inputs will go down our output line.

    On the other end, we'll use a demultiplexer to select where that signal will be routed to.

    This lets us use one signal pathway (cable, radio channel, whatever) for many different signals, each taking their turn.
  3. Papabravo


    Feb 24, 2006
    They can also be used as universal logic gates, generating any function n variables, where n is the number of select lines.
  4. Dave

    Retired Moderator

    Nov 17, 2003
    A good starting point is: Wikipedia's multiplexer article. The are also many good texts (available from your local library) which cover the topic in various degrees of detail.

    If you are more interested in the circuit level implementation, let me know and we can go down that route.