1. #1
    palaistuti
    Join Date
    Aug 2011
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    What is Diode? What is the work of diode? Can we replace anything with Diode?

    hi
    What is Diode? What is the work of diode? Can we replace anything with Diode?




  2. #2
    PRINCE-AKG
    Join Date
    Jul 2011
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    Re: What is Diode? What is the work of diode? Can we replace anything with Diode?

    Quote Originally Posted by palaistuti View Post
    hi
    What is Diode? What is the work of diode? Can we replace anything with Diode?


    Diode is a crystalline piece of semiconductor material connected to two electrical terminal having nonlinear current–voltage characteristic.

    It is diagrammatically represented as..


    The main function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking current in the opposite direction (the reverse direction).

    It's mainly applicable in following functions -
    • rectification,
    • Voltage controlling
    • convert alternating current to direct current,
    • modulation
    • damping and
    • all most every electronic circuity concerned with voltage current and frequency.

    Various types of Diode :-
    • Zener diodes
    • Avalanche diodes
    • varactor diodes
    • tunnel diodes,
    • Gunn diodes,
    • IMPATT diodes
    • light emitting diodes and etc..
    • Laser diodes
    • Thermal diodes
    • Photodiodes
    • Point-contact diodes
    • PIN diodes
    • Super barrier diodes
    • Gold-doped diodes
    • Snap-off or Step recovery diodes
    • Transient voltage suppression diode (TVS)

    Few diode can be replaced with various other electronics component i.e resistors, Op-amps and etc based upon the schematic diagram..

    But compete replacement of diode every were with specific component is not possible ..

    for complete information regarding diode characteristic and functionality have look at following link...
    or

    regards
    ~ASHISH~




  3. #3
    New Member
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    Re: What is Diode? What is the work of diode? Can we replace anything with Diode?

    Diode-It is mainly made up of Semiconductor with two terminals-
    One is positive and other one is negative.
    It conducts only in forward bias.
    Now I think you are thinking about what is forward bias so i will clear you.When positive terminal of battery attach to Positive terminal of Diode and negative of battery attach to Negative terminal then it is called forward bias.
    So Diode conducts Currents in only forward bias.
    Now talking about uses of diodes-
    Diode are used in Rectifier,LED and other electric appliances.
    It helps to convert AC to DC in case of Rectifier.
    Here i am attaching images of Diode it will help you.
    Attached Images

  4. #4
    Just Guesss?
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    Re: What is Diode? What is the work of diode? Can we replace anything with Diode?

    Hi friend !!!

    Diode Definition : A Diode is an electronic component which is commonly used to convert Alternating Current to Direct Current .

    It consists of two electrodes Anode and Cathode through which the current flows .
    In Diodes the current flows in only one direction , this is the fundamental principle of a Diode .
    Diodes make use of the nature of a p-n junction to achieve different behaviors for different current directions .

    When the cathode is negatively charged relative to the anode at a voltage greater than a certain minimum called forward breakover, then current flows through the diode and at the vice verse the current does not flows through the diode .

    The different types of Diodes are :

    Silicon diode
    Schottky diode
    Germanium diode
    Zener Diode
    Avalanche Diode
    LED -- Light Emitting Diode

    You can also have a glance on a video of Type of Diodes in you tube -- http://www.youtube.com/watch?v=hFPOVnTdEqI .

    A ZENER diode allows current to flow in both directions. In the "forward" direction, no current will flow until the voltage across the diode is about 0.7 volts (as with a normal diode). In the reverse direction (cathode more positive than the anode) no current will flow until the voltage approaches the "zener" voltage, after which a LOT of current can flow and must be restricted by connecting a resistor in series with the zener diode so that the diode does not melt .

    Diodes can be used as rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators .

    Yes , Some semiconductors can replace with diodes but many of the cases which used this type of application not succeeded , so there is no direct component developed so far which can replace a DIODE .

    Good Luck !!

  5. #5
    Kanha
    Join Date
    Jul 2011
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    Re: What is Diode? What is the work of diode? Can we replace anything with Diode?

    haiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii, dear
    diode
    a diode is a type of two-terminal electronic component with a nonlinear current-voltage characteristics
    types of diodes
    1. semiconductor diode
    2.vacuum tube diode
    work of the diode
    it is used to allow an electric current to pass in one direction while blocking the current in opposite direction
    2.it is also used to convert alternating current to direct current ,
    3.it is also used to extract modulation from radio signals in radio receivers.
    to get full information regarding diodes you can go the Wikipedia..........
    all the best

  6. #6
    vipul sharma
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    india
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    Re: What is Diode? What is the work of diode? Can we replace anything with Diode?

    A diode is a electronic component and is basically a two terminal semiconductor device that
    exhibits a non linear current voltage characterstic.Diodes forms the most basic component of electronics.
    The function of a diode is to allow the current to pass in one direction and to block the current in
    the reverse direction.A diode is used in electronic circuits to convert alternating current to Direct current.
    There are various kind of diodes are Avalanche diodes, Zener diode, crystal diodes, Gunn diode, light emitting
    diodes, laser diodes, photodiodes,PIN diodes etc.Diodes are used in a wide range of electronic circuits.
    Diodes are udes in rectifiers to convert AC to DC.They are also used in manufacturing automative actuators.
    They are also used for recovery or demodulation of Amplitude modulated waves or broadcasts.

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