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A Diode

A diode is a two-terminal component that permits current flow in one direction, functioning as a one-way valve for electricity. Common types include PN Junction, Zener, Schottky, LED, and Photodiode, each serving specific purposes like rectification, voltage regulation, and light emission. Key applications involve converting AC to DC, protecting against reverse polarity, and signal demodulation.

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16 views2 pages

A Diode

A diode is a two-terminal component that permits current flow in one direction, functioning as a one-way valve for electricity. Common types include PN Junction, Zener, Schottky, LED, and Photodiode, each serving specific purposes like rectification, voltage regulation, and light emission. Key applications involve converting AC to DC, protecting against reverse polarity, and signal demodulation.

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A diode is a two-terminal electronic component that allows current to flow in one

direction only—from the anode (positive side) to the cathode (negative side). It
acts like a one-way valve for electric current.

Basic Features:
 Symbol:

→|─
(Anode → Cathode)

 Function: Allows current to pass when forward-biased (anode voltage >


cathode), blocks current when reverse-biased.

Common Types of Diodes:


Type Function/Use
PN Junction General-purpose rectification
Zener Voltage regulation (works in
reverse bias)
Schottky Fast switching, low forward
voltage drop
LED (Light Emitting Diode) Emits light when current flows
through
Photodiode Converts light into current

Key Applications:
 Rectification: Converting AC to DC (in power supplies)
 Protection: Prevents reverse polarity damage
 Voltage Clamping: Using Zener diodes
 Signal Demodulation: In radio receivers
 Switching: In digital logic circuits

If you want, I can show a Simulink model example of a diode circuit like:

 Half-wave rectifier
 Full-wave rectifier
 Clipper or clamper circuit

Let me know!

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