Do not understand why the NPN transistor emitter current is negative

Discussion in 'Electronics Resources' started by eletmoraes, Jan 20, 2015.

  1. eletmoraes

    Thread Starter New Member

    Apr 18, 2011
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    0
    Analyzing the circuit created in Orcad get a negative current in the transistor, as the image below.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Orcad must use the convention that "current into any component pin is positive". Since in this circuit, current is actually flowing out of the emitter pin, then it puts a minus sign in front of it.
     
    ~EEC~ likes this.
  3. crutschow

    Expert

    Mar 14, 2008
    14,812
    3,807
    Most simulators use the convention that current into a device pin is positive.
    That may seem counter-intuitive but that's the convention.
     
  4. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,741
    839
    Not so long ago, maybe just two days, I asked the same question.

    Now, I feel more confident, let me tell you.

    Acredite!
     
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