The name diode is derived from “di–ode” which means a device that has two electrodes.
These belong to the world of "semiconductors".
Semiconductors are usually broken up into positive or P-type, and negative or N-type. --- this has nothing to do with the poles of a battery. The two types are joined together.
Orientation
A diode is a two-terminal electronic component that conducts
current primarily in one direction; it has low resistance in one
direction, and high resistance in the other. Wikipedia
They allow current to flow in one direction.
See the arrow.
A PN junction is the simplest form of the semiconductor diode.
Semiconductor diodes are the most common type of diode.
Different Types of Diodes
- Small Signal Diode. ...
- Large Signal Diode. ...
- Zener Diode. ...
- Light Emitting Diode (LED) ...
- Constant Current Diodes. ...
- Schottky Diode. ...
- Shockley Diode. ...
- Step Recovery Diodes. (Snap-off)
- PN Junction Diodes
- Tunnel Diode (Esaki)
- Varactor diode (Varicap)
- Photo diode
- PIN diode
- Lazer diode
- Avalanche Diode
- Vacuum Tube diodes
- Crystal rectifier (crystal diodes)
- Gunn Diodes
- Thermal Diodes
- Stabistors or Forward Reference Diodes
- Gold-doped diodes
- Super barrier diodes
Schottky Diodes
Very commonly used in Synthesizers.
The main application area of Schottky diodes is in switching power supplies which are intended to work with frequencies over 20kHz.
They are also known as barrier or hot carrier diodes.
They have their own symbol.
It has a low forward voltage drop and a very fast switching speed.
The forward voltage drop is substantially less than that of the conventional silicon pn-junction diode.
A silicon p–n diode
has a typical forward voltage of 0.6 – 1.7 Volts, while the Schottky's
forward voltage is 0.15– 0.45 V. This lower forward voltage requirement
allows higher switching speeds and better system efficiency.
These are all different types of Schottky Diodes
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Photo diodes
A photodiode is a PN-junction diode that consumes light energy to produce an electric current.
It's designed to absorb photons.
They are also called a photo-detector, a light detector, and a photo-sensor.
Photodiodes are designed to work in reverse bias condition.
Typical photodiode materials are Silicon, Germanium and Indium gallium arsenide.
In the NLC Lux module, its used to make a "optical thermin".
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