BB 555-02V E7912

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BB 555-02V E7912 Variable Capacitance Diodes

Variable Capacitance Diodes, generally known as Varicaps, Varactors, are diodes capable of continuously adjusting their capacitance between two terminal plates. This is done by varying the voltage across the diode, thereby altering its electrical state. The BB 555-02V E7912 is a state-of-the-art Varicap diode designed by MIT Lincoln Laboratory, and it is an example of efficient, reliable Variable Capacitance Diode technology.

The BB 555-02V E7912 is an epitaxial planar Varicap diode with a maximum capacitance of 30pF, under a full bias of 10 volts. The device has a 14.41 x 14.41mm surface-mount package and comes with a 2-tab configuration comprising of an anode and a cathode. The device is available in a range of configurations, such as a dual diode, a quad diode and an 8 diode configuration.

The primary application of Variable Capacitance Diodes is in tuning radio circuits. By varying the capacitance, frequencies (or frequency bands) can be adjusted, allowing finely tuned radio reception. Variable Capacitance Diodes have also been used in oscillator circuits, voltage-controlled amplifiers and computer memories, where their variable capacitance allows for precise control over parameters that are normally difficult to set with conventional diode technology.

The BB 555-02V E7912 is a high performance device. It has a low capacitance variation of 0.003 to 0.03pF/V and a low reverse leakage current of 50nA, when operating at a reverse bias voltage of 10 volts. The device has also been designed to reduce self-noise and ensure reproducible switching characteristics. This makes the BB 555-02V E7912 ideal for precision tuning applications.

The working principle of Varicap diodes can be understood by taking a look at their electrical equivalent circuit. The equivalent circuit consists of a capacitor between two terminals, with a voltage-controlled current source between them. When a voltage is applied, the current source causes charges to flow at the terminals, which results in the capacitor being charged or discharged. This changes the capacitance between the terminals, thus allowing for precise tuning of a range of electrical parameters.

In conclusion, the BB 555-02V E7912 Variable Capacitance Diode is a state-of-the-art device with a wide range of applications, from precision tuning of radio circuits to voltage-controlled amplifiers and computer memories. The device\'s ability to control parameters through its variable capacitance is invaluable, making it a versatile and reliable tool for many industries.

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