Transistor in Saturation( Switch Application)

Discussion in 'General Electronics Chat' started by Tree1, Mar 20, 2012.

  1. Tree1

    Thread Starter Member

    Nov 30, 2010
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    So I've ready many explanations on how a transistor operates as an amplifier and I've understood it( I think). But what I do not get is what happens to the majority carriers( electrons) in the collector region when the base-collection region becomes forward bias ( electron flow) in saturation. I cannot understand. I've red that the base current flows up into the collector and collector current flow down..This is confusing. So IE and IC oppose each other ?? If so how does the equation IE = IB + IC still hold. Please, I only interested in what happens in saturation. This is where I am confused.
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    When a transistor is saturated then the collector to emitter current is very high. The base current adds to the collector current that is flowing into the emitter and some of the collector current flows into the base because the collector-base diode is forward-biased.
     
  3. Tree1

    Thread Starter Member

    Nov 30, 2010
    46
    0
    Thank you very much , I think I am getting there.
     
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