Diodes - Variable Capacitance (Varicaps, Varactors)

Diodes - Variable Capacitance (Varicaps, Varactors) | 1220 items

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Capacitance @ Vr, F Capacitance Ratio Capacitance Ratio Condition Voltage - Peak Reverse (Max) Diode Type Q @ Vr, F Operating Temperature Mounting Type Package / Case Supplier Device Package

Questions with Diodes - Variable Capacitance (Varicaps, Varactors)

  • Ask: Do diodes have capacitance?

    Answer: Diode capacitance consists of 2 components. Junction capacitance and diffusion capacitance. Junction capacitance comes from the depletion region. There is junction capacitance in both forward and reverse bias.

    capacitance

  • Ask: How does a varactor diode work?

    Answer: A varactor diode is designed to store electric charge not to conduct electric current. So varactor diode should always be operated in reverse bias. When a reverse bias voltage is applied, the electrons from n-region and holes from p-region moves away from the junction.

    varactor diode

  • Ask: Who invented varactor diode?

    Answer: The varicap was developed by the Pacific Semiconductor subsidiary of the Ramo Wooldridge Corporation who received a patent for the device in June 1961.

    varicap

  • Ask: What is the symbol of varactor diode?

    Answer: The symbol of the varactor diode is similar to that of the PN-junction diode. The diode has two terminals namely anode and cathode. The one end of a symbol consists the diode, and their other end has two parallel lines that represent the conductive plates of the capacitor.

    capacitor

  • Ask: How does a varactor work?

    Answer: A varactor diode is designed to store electric charge not to conduct electric current. So varactor diode should always be operated in reverse bias. When a reverse bias voltage is applied, the electrons from n-region and holes from p-region moves away from the junction.

    varactor, should

  • Ask: What is varactor diode and its application?

    Answer: Varactor or varicap diodes are used mainly in radio frequency or RF circuits to provide voltage controlled variable capacitance. These electronic componenta can be used in a whole variety of ways where a capacitance level needs to be controlled by a voltage.

    varactor, varicap diodes

  • Ask: What is the function of varactor diode?

    Answer: Varactor diodes, also called varicaps, are semiconductor devices that behave like variable capacitors. When reverse-biased, they have a capacitance that varies with an applied voltage. They are most often used in devices that require electronic tuning, such as radios.

    varactor