Question

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a) Description, b) Symbol, c) Physical construction, d) Operation/ VI Characteristic Curve, e) Application of the following special purpose diodes:
1. Signal Diodes
2. Power Diodes/ Rectifier Diodes
3. Schotkky Diode
4. Light Emitting Diodes
5. Laser Diodes
6. Photo Diodes
7. PIN Diodes
8. Zener Diodes

Answer 1

Special purpose diodes serve different functions and have unique characteristics. Examples of such diodes include signal diodes, power/rectifier diodes, Schottky diodes, light emitting diodes (LEDs), laser diodes, photo diodes, PIN diodes, and Zener diodes.

Step-by-step explanation:

1. Signal Diodes: These diodes are used to convert alternating current (AC) signals into direct current (DC) signals. They are commonly used in signal processing circuits.
2. Power Diodes/Rectifier Diodes: These diodes are designed to handle high current and voltage levels. They are used in rectification circuits to convert AC power into DC power.
3. Schottky Diode: This diode has a low forward voltage drop and fast switching speed. It is commonly used in high-frequency applications and as a rectifier in power supplies.
4. Light Emitting Diode (LED): This diode emits light when forward biased. LEDs are used in various applications like displays, indicators, and lighting.
5. Laser Diode: These diodes emit coherent light, making them suitable for applications like laser pointers, optical communication, and optical storage.
6. Photo Diode: Photo diodes are used to detect light and convert it into an electrical signal. They find applications in light sensors, optical communication, and solar panels.
7. PIN Diode: These diodes have a wider depletion region, allowing them to handle higher power levels. They are used in RF switches, attenuators, and photodetectors.
8. Zener Diode: Zener diodes are designed to operate in reverse breakdown voltage. They are used in voltage regulation and protection circuits.