question

Discussion in 'General Electronics Chat' started by dlmcknny63, May 26, 2008.

  1. dlmcknny63

    Thread Starter Member

    May 25, 2008
    11
    0
    what is the inputs of A and B if the output of a two-input NAND gate is a zero
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    The inputs may be
    A=0, B=0
    A=0, B=1
    A=1, B=0

    If the inputs are A=1, B=1 then the output is 1
     
  3. dlmcknny63

    Thread Starter Member

    May 25, 2008
    11
    0
    Thank You Sir...........:)
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Methinks there be a typo here...:confused:
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    No soup for you!

    NAND truth table:
    Code ( (Unknown Language)):
    1. A B |Out
    2. ----+---
    3. 0 0 | 1
    4. 0 1 | 1
    5. 1 0 | 1
    6. 1 1 | 0
    [eta] No soup for me, either! :D
     
    Last edited: May 26, 2008
  6. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Methinks there STILL be typos here!:rolleyes: No soup for either of you!

    "NAND" means "NOT AND." (But you knew that.) "AND" means both i/p must be high for the output to be high. (But you knew that.) "NOT" means, we invert the output. (But you knew that, too.)
     
  7. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Ohhh!!! You are right thingmaker, he wants a NAND gate and not an AND gate. I was not very carefull and i didnt notice that. Thus the correct answer is:

    You get a 1 on the output if
    A=0, B=0
    A=0, B=1
    A=1, B=0

    If the inputs are A=1, B=1 then the output is 0

    I am sorry for the wrong answer dlmcknny63
     
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