MV104

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Variable capacitance diodes, also known as varicaps or varactors, are semiconductor two-terminal devices. They are commonly used in voltage-tuning circuits and other frequency-related applications. The NTE MV104 is a type of high-voltage varicap diode that is typically used in superheterodyne AM/FM radio units as local oscillator diodes to varying the voltage slightly to produce different radio frequencies.

The MV104 is a high stability, low leakage silicon varicap diode that has a reverse breakdown voltage of 1.2kV and a capacitance of 1000 - 1400pF. It has an operating temperature range of -55°C to +125°C and is designed to provide linear and adjustable capacitance referenced to a stable, reverse-voltage reference.

The basic principle of operation of varicap diodes is based on the special behavior of p-n junctions. When the anode is positively biased with respect to the cathode, a depletion layer is formed between these two terminals due to an electric field, causing the junction to act as a capacitor with permeability depending on the width. By increasing the forward-bias voltage, the width of the depletion region increases, resulting in an increase in the capacitance of the diode.

The MV104 is a special type of varicaps diode that offers extremely high stability and low leakage characteristics. Its capacitance is unaffected by changes in the forward voltage over a wide range and is significantly lower than the standard silicon varicaps. This makes the MV104 particularly well-suited for use with AM/FM radio units, where a very low forward voltage is necessary to maintain the desired radio frequency.

The MV104 can also be used in other applications, such as antenna tuning, variable channel selectivity, adjusting the voltage gain of audio amplifiers, and tuning of oscillators. In addition, the MV104 can also be used to adjust the gain of the IF amplifiers in mobile radios.

The MV104 is a versatile and reliable device that is well-suited for a variety of voltage-tuning circuits and frequency-related applications. Its low leakage characteristics and stability over wide range of Biased voltages make it an ideal choice for AM/FM radio units, as well as for various other applications.

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