BJT

Discussion in 'General Electronics Chat' started by full, Sep 29, 2014.

  1. full

    Thread Starter Member

    May 3, 2014
    225
    2
    Hello everybody,
    What different between AC Bipolair Junction Transistor & Amplifier Bipolair Junction Transistor ?
    Thanks
     
    Last edited: Sep 29, 2014
  2. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    full likes this.
  3. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    Hello full, have you got your maths problem solved now?

    Are you perhaps referring to different circuit analyses for transistors?

    We perform a static or DC analysis for the purpose of setting up the transistor biasing to the correct mean operating or Q point.

    We can then perform an AC signal analysis on the transistor in its biased circuit configuration.

    There are two forms of such analysis

    Small signal analysis

    and , yes you've guessed it,

    Large signal analysis.

    The reason that we have two is that transistors are not linear devices, wheich means that their properties (characteristics or parameters) change with the signal.
    In a small signal analysis we assume this change is negligable.
    In a large signal analysis we take it into account.
     
    full likes this.
  4. full

    Thread Starter Member

    May 3, 2014
    225
    2
    Thanks sir,
    I think the Ac and amplifier same in circuit no different ,
    if I change DC BJT to AC BJT , what happen?
    Thanks
     
  5. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    What are your DC BJT and AC BJT?
     
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