transistor output voltage polarity

Discussion in 'General Electronics Chat' started by amaresh92, Nov 26, 2010.

  1. amaresh92

    Thread Starter New Member

    Oct 31, 2010
    23
    0
    greetings,
    when a transistor in common emitter configuration is given a ac signal with base current,the amplified output form from collector of it gives inverted polarity of the input voltage or the output graph of voltage versus time gets inverted of input graph of voltage versus time.how is it so?

    thanks.
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Why don't you try using a SPICE simulator on a transistor with emitter and collector resistors?

    It's just the way it works; the collector has the polarity inverted from the input on the base. The emitter is basically (sic) in-phase with the input on the base.
     
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