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Why is silicon preferred over germanium in preparing diode?
How do varactor diodes differ from normal diodes?
Varactor diodes, also known as voltage variable capacitors, are special type of diodes that are used to change the capacitance of a circuit as the voltage across the diode changes. This makes them useful for applications such as oscillators, filters and frequency multipliers. Normal diodes, on the other hand, are used to allow current to flow in one direction only and are used in rectification circuits and voltage regulators.