Diodes - RF

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A diode usually consists of two electrodes: the anode and a cathode. Like transistors, diodes are also made with semiconductor materials like silicon, selenium, or germanium. Often the diodes may consist of metal electrodes placed in a chamber filled with pure elemental gas at low pressure. Diodes can be used as the following:

• Rectifiers 
• Signal Limiters
• Voltage Regulators 
• Switches
• Signal Modulators
• Signal Mixers
• Signal Demodulators 
• Oscillators

Working Principle of Diodes

The functioning rule of this diode is like the typical PN junction diode. Whenever the voltage of the anode terminal is high than the voltage of the cathode terminal, the diode conducts. The scope of sending voltage drop in this diode is tiny, roughly 0.5V - 1.2V. In this mode, the diode functions as a forward trademark.

On the off chance that the cathode's voltage is higher than the voltage of the anode, the diode proceeds as obstructing mode. In this mode, the diode performs like the converse trademark.

Types of Diodes

• General Purpose Diodes
• Schottky Diodes
• Non-Punch Through Diodes
• Switching Diodes
• Laser Diodes
• Constant Current Diodes
• Varactor Diodes

Applications

• Diodes supply uncontrolled rectification of power.
• They are used for various applications such as DC power supplies, charging batteries, inverters, and AC rectifiers.
• They have characteristics like voltage and high current diodes, like snubber networks and freewheeling diodes.
• They are used as freewheeling diodes, high voltage rectifiers, and Feedback.