Diode, and type of diode bias
Diode is packaged in a small capsule made of glass or plastic. Diode packaging has two wire terminals, one is called anode, while the other is called cathode. Usually there is a ring worn on the body diode indicating which terminal is the cathode.A diode is generally made of silicone. Silicon is material that is not a conductor, but is not also as an insulator. Silicon is a semiconductor material. This means the characteristics of silicon is different from usual conductor materials, such as copper or iron.
A small amount of a substance mixed into the silicon to give special characteristics to the material of this diode.
Major constituent of the diode is the connection P - N or called with P - N Junction.
Below is symbol of diode
Forward Biased and Reverse Biased Diode
When the diode is connected as in Figure A above, where the anode wire is connected to the positive pole and the cathode connected to the negative pole of battery, we say that forward biased diode. A diode will only conduct electricity (turn on a light) when given forward bias.
When a diode is connected with reversed polarity as shown in Figure B, where the cathode wire is connected to the positive pole and the anode connected to the negative pole of battery, we say that reverse biased diode . A diode will not conduct electricity (turn off a light) when given reverse bias.
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