Unknown electronic symbol

Discussion in 'General Electronics Chat' started by sportsfan27, Jul 22, 2009.

  1. sportsfan27

    Thread Starter Active Member

    Jan 29, 2009
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    I came across this symbol and I don't know what it is. Can anyone tell me what it is? Thanks for any help
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    It looks like a gate with schmmitt trigger inputs.
     
  3. Vaughanabe13

    Active Member

    May 4, 2009
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  4. sportsfan27

    Thread Starter Active Member

    Jan 29, 2009
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    OK thanks very much for your help!
     
  5. sportsfan27

    Thread Starter Active Member

    Jan 29, 2009
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    Sorry, one more question: what kind of gate is it?
     
  6. millwood

    Guest

    it is likely a nand gate with input hysteria.
     
  7. sportsfan27

    Thread Starter Active Member

    Jan 29, 2009
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    OK thanks again
     
  8. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    You would need to post the entire circuit schematic in order for us to make some kind of determination as to what would make sense for type of gate it is.

    The symbol is an obsolete type from the 50's:
    http://www.cs.ubc.ca/~hilpert/e/gates/gates.gif

    It COULD be a NAND, NOR, or NOT (inverter) with multiple inputs, but it is definitely a Schmitt trigger; the input has hysteresis.
     
  9. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    I miss the symbol for the type of gate.
    Take a look at this page for the gate types:
    http://www.kpsec.freeuk.com/gates.htm

    The symbol in the drawing you gave stands for a schmidt trigger.

    Greetings,
    Bertus
     
  10. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Must be female. :D

    John
     
  11. russ_hensel

    Well-Known Member

    Jan 11, 2009
    818
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    Look out for this type of gate, when it gets worked up it can output almost anything.

    http://en.wikipedia.org/wiki/Hysteria


    ( my bad )

    edit: sorry I missed the posting by jpanhalt
     
    Last edited: Jul 24, 2009
  12. someonesdad

    Senior Member

    Jul 7, 2009
    1,585
    141
    That answer gave me hysteria. :)
     
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