BB182,335

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Diodes - Variable Capacitance (Varicaps, Varactors) are versatile components that enable electronic engineers and technicians to regulate several parameters in electronic circuits. Commonly used in television sets, radios, and other consumer electronics, these components have a wide range of applications. The BB182,335 is one example of a varactor diode, which provides a reliable source of electrical energy in various applications. This article outlines the application field and working principle of the BB182,335.

Application Field of the BB182,335

The BB182,335 is designed for applications that involve the generation and control of signals within television systems. It can be used in both analog and digital systems, allowing the user to regulate the tuner frequency, modulation spread and tuning voltage of the device. It is also suited for multi-standard television tuner applications. Examples of the types of TV systems that can benefit from the implementation of the BB182,335 include ATSC, DVB, PAL, SECAM and ISDB-T, as well as ATV and DTV. Additionally, the BB182,335 can be used in applications that involve low- and high-power radio frequency (RF) stages in consumer electronics, such as satellite systems and digital mobile radios.

Working Principle of the BB182,335

The BB182,335 is a junction-gate field-effect transistor (JFET) that functions as a voltage-dependent capacitance. This is achieved through a voltage-controlled capacitance (VCC) gate, which allows for the adjustment of the diode capacitance depending on the gate voltage. The gate voltage is connected to a tuning circuit, so that when the tuning circuit is adjusted, the voltage on the gate changes and hence alters the capacitance of the diode. This allows the modulation spread and frequency of the device to be adjusted, allowing for the tuning of the TV signals.

The BB182,335 can deliver a capacitance range of 6.5 to 15 picofarads (pF) with a tuning voltage range of 0 to 10 volts. It operates with a voltage supply range of 8 to 20 volts, and can be used in temperatures ranging between 0 and 70°C. The diode is sealed in a hermetically-compacted metal-ceramic package with two leads, making it highly robust.

Conclusion

In summary, the BB182,335 is a variable capacitance diode that is designed for the control of signals in television systems. It is capable of regulating the modulation spread, frequency and tuner voltage of the device, and is suitable for use in analog and digital systems. The high level of robustness offered by the device, combined with its efficient performance, makes it ideal for use in a variety of consumer electronics applications.

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