Diode

Diode

A Diode (/ˈdaɪ.oʊd/) is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other.

Etymology

The term "diode" is derived from the Greek roots di, meaning "two", and ode, meaning "path". It was named for its two terminals, through which electricity must pass.

History

The first types of diodes were created in the early 20th century with the development of radio and the need for a device that could allow a current to flow in one direction but not the other. This was achieved by using a two-electrode design, which is where the term "diode" comes from.

Types of Diodes

There are several types of diodes, each with its own specific function and characteristics. These include:

• Zener Diode
• Light Emitting Diode (LED)
• Schottky Diode
• Photodiode
• Laser Diode

Applications

Diodes are used in a wide variety of applications, including:

• Rectifier: Converts alternating current (AC) to direct current (DC).
• Voltage Regulator: Maintains a constant output voltage.
• Switch: Allows or blocks the flow of current.
• Signal Modulator: Modulates a signal to produce an output.

Related Terms

• Semiconductor
• Transistor
• Resistor
• Capacitor
• Integrated Circuit

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