Part Number: SMV1222-001 Manufacturer: Skyworks Solutions, Inc. In fact ordinary PN junction diodes can be used as varactor diodes, even if their performance is not to … As shown … Varactor diodes are commonly used in varactor circuits to realize automatic frequency control, tuning, frequency modulation, and scanning oscillation of circuits. Part Function: Part Number: Description: Design Kit: KIT609. It is combination of variable capacitor and diode . In other words, it is a specially designed semiconductor diode whose capacitance at the p-n semiconductor junction changes with the change in voltage applied across its terminals. Product Specifications For SMV1770-079LF Diode-Varactor. Product Specifications For SMV1222-001 Diode-Varactor. 2. Variable capacitance diode( Varactor Diodes ) Variable capacitance diode, also known as varactor Diodes, are semiconductors that change the junction capacitance according to the voltage supplied. Working principle: Varactor Diodes is a kind of special diode. Skyworks. Varactor diode circuit symbol. The resonant frequency of the simple VTO model is given as. Therefore, the electrons in the n-type semiconductor have high potential energy than the electrons in the metal. 1, at A. The work function is different for metal and semiconductor. A type оf simple semiconductor diode commonly uѕеd іn electronics ѕuсh аѕ parametric amplifiers, filters, oscillators аnd frequency synthesizers, varactor diodes hаvе а variable capacitance, whісh іѕ а function оf thе voltage impressed оn іtѕ terminals. Information About Varactor Diode A tuning diode, also known as a varactor diode, variable capacitance diode, varicap diode or variable reactance diode, is a diode that has a variable capacitance which is a function of the voltage that is impressed on its terminals. Light-emitting Diode. The varactor diode or varicap diode consists of a standard PN junction, although it is obviously optimised for its function as a variable capacitor. By changing the capacitance, we change the frequency. Varactor Diodes, also called "variable reactance diodes," are made by using the characteristic that the junction capacitance changes with the applied voltage when the pN junction is reverse biased. A: The varactor diode (Figure 1), also called a voltage variable capacitor (VVC) or varicap diode, is constructed and doped so that its capacitance varies as a function of the applied reverse-bias voltage. A varactor diode is a type of diode whose capacitance varies as a function of the voltage applied across its terminals. In electronics, a varicap diode, varactor diode, variable capacitance diode, variable reactance diode or tuning diode is a type of diode designed to exploit the voltage-dependent capacitance of a reverse-biased p–n junction. A diode-based varactor is operated in the reverse-bias mode, and in this mode the depletion capacitance is dominant. The varactor is a type of pn-junction diode with relatively high junction capacitance when reverse biased.The capacitance of the junction is controlled by the amount of reverse voltage applied to the device, which makes the device function as a voltage-controlled capacitor. VariCap Diodes are also called Varactor Diodes and are defined as whose internal capacitance changes with applied reverse bias voltage and Possess Variable Reactance Varactors are widely applied as electronic tuning devices in microwave systems. Varactor Diode . The work function of a metal is greater than the work function of a semiconductor. Total Capacitance . The RC value determines the frequency of the waveform. A reduced value of the electric field is observed owing to the nonlinear behavior of the electric field at the hyperabrupt junction, although the device has a larger doping density at the Schottky junction. In this way it is obvious that it is being used as a variable capacitor rather than a rectifier. It is meant for high frequency applications . Function of a varactor diode Date: 20 May 2006: Source: Own work: Author: Shaddack: Permission (Reusing this file) Public domain (PD) Other versions: Varactor function-ru.svg. Please view our large selection of varactor diodes below. As the magnitude of the reverse bias applied to the junction increases, the field in the depletion region becomes larger and the majority carriers are pulled back further from the junction. Therefore the basic material used to manufacture diode is Gallium Arsenide or Germanium . 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