multiplexer 4 to 1 with NOR gates?

Discussion in 'Homework Help' started by Fink, May 2, 2010.

  1. Fink

    Thread Starter New Member

    May 2, 2010
    2
    0
    Hi, I'm trying to do some homework but I'm stuck. I have to design a 4 to 1 multiplexer using NOR gates. I looked all over the internet but I can't find anything. Can you help me?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    Take a look at this PDF:
    http://www.stanford.edu/class/ee121/handouts/lect06.pdf

    This is a link from the EDUCYPEDIA on digital encoders and decoders:
    http://www.educypedia.be/electronics/digitalcodes.htm

    There are more pages like that over there:

    Digital electronics:
    Arithmetic circuits D/A-A/D converters Number systems Codes and decoders Flip flops Technology Counters and registers General overview Technology-CMOS Digital logic Memories Technology-TTL Timers and oscillators

    Greetings,
    Bertus
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If it helps, the first computers made with transistors used the NOR gate as the basic logic element.

    Make a truth table for guidance.
     
  4. Fink

    Thread Starter New Member

    May 2, 2010
    2
    0
    Thanks for the links.
    I have the truth table and I also made the relation(don't know if it called like that), it is Y=A*S1'*S0'+B*S1'*S0+C*S1*S0'+D*S1*S0
    but I still don't know how to make this circuit with NOR gates
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Try it with two signals and one enable bit. Build on that.
     
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