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transistor and diode blocking voltages

Discussion in 'Electronic Design' started by bumdegi, Oct 15, 2008.

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  1. bumdegi

    bumdegi Guest

    Can someone please explain to me how transistors can block positive
    voltage whereas diodes block negative voltage.

    Cheers
     
  2. HardySpicer

    HardySpicer Guest

    Depends which way round they are connected and whether they are P or N
    type!


    Hardy
     
  3. Jasen Betts

    Jasen Betts Guest

    Diodes block reversed voltage due to the way in which the conduct
    electricty causing a break in the conductive path when they are
    reversed in relation to the voltage.

    http://en.wikipedia.org/wiki/Diode

    transistors can be used in combination with other electronic parts to
    regulate or block over voltage but how they work is more complicated.

    http://en.wikipedia.org/wiki/Linear_regulator
    http://en.wikipedia.org/wiki/Transistor

    MOSFETs (a type of transistor) can also be used like a diode to
    protect against backwards voltage.

    Further questions of this nature are bast asked in
    sci.electronics.basics

    Bye.
    Jasen
     
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