State the use of the following Tunnel diode,veractor diode,pin diode,schlothy diode,zenor diode and light emitting diode ?

- Tunnel diode: Used in high-frequency oscillators and amplifiers due to its negative resistance characteristic.
- Varactor diode: Used in voltage-controlled oscillators, frequency modulators, and phase-locked loops.
- PIN diode: Used in RF switches, attenuators, and photodetectors.
- Schottky diode: Used in high-frequency applications, rectifiers, and voltage clamping circuits.
- Zener diode: Used in voltage regulation, voltage reference, and overvoltage protection circuits.
- Light emitting diode (LED): Used in displays, indicators, lighting, and optical communication systems.

Tunnel Diode
- High-speed switching devices in digital circuits
- Oscillators
- Amplifiers with high bandwidths

Varactor Diode
- Voltage-controlled capacitors in RF circuits
- Frequency multipliers
- Voltage-controlled oscillators

PIN Diode
- RF switches
- Attenuators
- Limiters
- High-power rectification

Schottky Diode
- High-speed rectification
- Low forward voltage drop
- Switching applications
- Voltage detectors

Zener Diode
- Voltage regulators
- Reference diodes
- Surge protectors
- Clamp diodes

Light Emitting Diode (LED)
- Indicator lights
- Seven-segment displays
- Optocouplers
- Lighting applications