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Basic electronics

Discussion in 'Electronic Basics' started by karthik, Dec 13, 2005.

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  1. karthik

    karthik Guest

    What are Schkotty diodes.What is the application of the diodes
     
  2. Puckdropper

    Puckdropper Guest

    Try doing a google search for "Schottky diode" (Note the spelling.)

    I see you're already using Google Groups, so you're halfway there.

    Puckdropper
    --
    www.uncreativelabs.net

    Old computers are getting to be a lost art. Here at Uncreative Labs, we
    still enjoy using the old computers. Sometimes we want to see how far a
    particular system can go, other times we use a stock system to remind
    ourselves of what we once had.

    To email me directly, send a message to puckdropper (at) fastmail.fm
     
  3. Richard

    Richard Guest

    Try a Google search for 'Schottky'
     
  4. A Schottky diode is sort of a half junction, It is made by coating N
    type semiconductor with a metal. Schottky diodes have about half the
    forward drop of a full PN junction, but also has very low reverse
    voltage capability, compared to PN junction diodes.

    In a normal PN junction diode, the p side injects holes into the N
    side and the N side injects electrons into the P side, where these
    minority carriers find their opposites and disappear. But when a
    reverse bias is suddenly applied, the minority carriers turn around
    and head back across the junction and must all be swept out before the
    diode achieves reverse bias shut off.

    Since there is no source of holes in a Schottky half junction pass to
    the N type material during forward bias (metals conduct entirely with
    electrons, so they simple absorb the electrons passes from the N side)
    there is no reverse bias delay when the diode is reverse biased, just
    a variable capacitance as the electrons are pulled back from the metal
    when the N side switches to positive bias.
     
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