DIODE

DIODE (PN-junction diode)

      Diode is a one of the semiconductor device. It’s has a two terminals that Anode and Cathode. Diode used for the circuit one direction current flow, That is positive to negative. The Diode actual name is PN-JUNCTION DIODE. PN junction are elementary block of semiconductor electronic device such as Diode, Transistor, solar cell, and Integrate circuit (IC).

CONTRUCTION

          The Diode actual name is PN-JUNCTION DIODE.A p-n junction is a interface between the two types (P-type, N-type) of silicon material inside a single crystal semiconductor. The “p” (positive ) side contain a more than holes, and “N” (Negative) side contain a more than electrons and Outer shells of the Neutral Atom there

FUNCTION

          . The PN junction created by Doping or iron implantation. That meaning is the net movement of the electrons from the layer of high resistance to low resistance. Anode contain a excess of holes and Cathode contain a excess of electrons. When positive suppy given to Anode and negative is cathode, at excess of electrons move to holes Diode will conduct. Diode separate the two types from based it’s function

There are

            FORWARD BIAS

            REVERSE BIAS

FORWARD BIAS

   Positive supply is applied by the Anode terminal, and Negative supply applied by the Cathode terminal of Diode is called as a Forward bias. If external voltage becomes greater then the value of potential value is 0.7volt the depletion region decrees and current will be start to flow. Diode is conduction mode for forward bias

REVERSE BIAS

  Negative supply is applied by the Anode terminal, and positive supply applied by the Cathode terminal of Diode is called as a REVERSE BIAS. If cathode  voltage less the value of Anode the depletion region increased this cause for resistance value is too increase diode is not conducted but reverse bias