saturation region

Discussion in 'General Electronics Chat' started by i_nour, Dec 5, 2015.

  1. i_nour

    Thread Starter Member

    Nov 9, 2015
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    Can the transistor fall into the saturation region with the collector being in the reverse-biased ?
     
  2. dl324

    Distinguished Member

    Mar 30, 2015
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    No.
     
  3. i_nour

    Thread Starter Member

    Nov 9, 2015
    30
    1
    then why when the voltage of the resistor compound with "say collector" is bigger than the voltage of the source we say that the transistors is in the saturation state ?
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
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    Your description is unintelligible, post a schematic. When a transistor is saturated, both junctions are forward biased.

    You could also try doing some simple research. Any book on BJTs will have the information you want.
     
  5. i_nour

    Thread Starter Member

    Nov 9, 2015
    30
    1
    The voltage of Rc here is 85.14 mA

    d.png
     
  6. dl324

    Distinguished Member

    Mar 30, 2015
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    You say voltage of (I assume you mean across), is a current?

    In this circuit, the current through Rc can be no more than 12mA. When the transistor is saturated, Vce would be close to 0V. That means both junctions are forward biased.
     
  7. i_nour

    Thread Starter Member

    Nov 9, 2015
    30
    1
    I think I get it, thank you
     
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