please I need help in this circuts

Discussion in 'General Electronics Chat' started by spidermanIIII, Nov 27, 2013.

  1. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    0
    I want to know how this circuit of NAND gate work and the direction of current in each wire in the circuits
     
  2. tshuck

    Well-Known Member

    Oct 18, 2012
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    675
    Have you tried this in a circuit simulator? I guarantee that it will answer your questions...
     
  3. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
    0
    I want to know how this circuit work
     
  4. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    What is your understanding of electronics?

    Understanding how the circuits works is different from understanding what it is doing.
     
  5. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
    0
    I can't understand the the transistor Q1 with representation with diodes
     
  6. WBahn

    Moderator

    Mar 31, 2012
    18,085
    4,917
    There are three possible combination of inputs. Both HI (equal to Vcc), both LO (equal to ground), and mixed (one HI and the other LO).

    Take each combination in turn and decide which diodes are ON and which diodes are OFF. Make a table and post that to give us something to start with.

    If you need to study up on diodes, check out Vol 3 of the E-book

    http://www.allaboutcircuits.com/vol_3/index.html
     
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