Diode Forward Bias characteristics

Discussion in 'Homework Help' started by logearav, Oct 2, 2011.

  1. logearav

    Thread Starter Member

    Aug 19, 2011
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    0
    Revered members,
    Kindly see my attachment.
    From the options given, i think the answer is ON switch, because when the input is low, that is when the applied voltage is below the breakdown voltage(0.7 V for Silicon) the current is low and when the applied voltage is equal or above the breakdown voltage, there is saturation.
    Am I correct?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,348
    Hello,

    Yes, you are right:

    From the eBook Page: http://www.allaboutcircuits.com/vol_3/chpt_3/1.html

    • A diode is an electrical component acting as a one-way valve for current.
    When forward biased the "switch" is closed.
    When reverse biased the "switch" is opened.

    Bertus
     
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  3. Adjuster

    Well-Known Member

    Dec 26, 2010
    2,147
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    Note however that the term "breakdown voltage" is also commonly used to denote the reverse breakdown voltage at which a diode begins to conduct, i.e. the limit of its reverse blocking capacity. http://en.wikipedia.org/wiki/Breakdown_voltage

    I believe that technical English (at least in UK), normally refers to the "forward voltage" or "cut-in voltage" for conduction in the preferred direction.
     
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  4. logearav

    Thread Starter Member

    Aug 19, 2011
    248
    0
    Adjuster,
    I stand corrected. It is forward voltage ( 0.7V for Si and 0.3V for Germanium). Thanks for clarifying.
     
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