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  2. Variable capacitor - Wikipedia

    en.wikipedia.org/wiki/Variable_capacitor

    A digitally tuned capacitor is an IC variable capacitor based on several technologies. MEMS , BST and SOI / SOS devices are available from a number of suppliers and vary in capacitance range, quality factor and resolution for different RF tuning applications.

  3. Varicap - Wikipedia

    en.wikipedia.org/wiki/Varicap

    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.

  4. LC circuit - Wikipedia

    en.wikipedia.org/wiki/LC_circuit

    The two-element LC circuit described above is the simplest type of inductor-capacitor network (or LC network). It is also referred to as a second order LC circuit [ 1 ] [ 2 ] to distinguish it from more complicated (higher order) LC networks with more inductors and capacitors.

  5. Applications of capacitors - Wikipedia

    en.wikipedia.org/wiki/Applications_of_capacitors

    Air gap tuning capacitor. Capacitors and inductors are applied together in tuned circuits to select information in particular frequency bands. For example, radio receivers rely on variable capacitors to tune the station frequency.

  6. Tuner (radio) - Wikipedia

    en.wikipedia.org/wiki/Tuner_(radio)

    Tuners generally include a tuning knob or keypad to adjust the frequency, i.e. the intended radio station, measured in megahertz (e.g. 101.1 MHz). Mistuning is the greatest source of distortion in FM reception. [3] Some models realize manual tuning by means of mechanically operated ganged variable capacitors (gangs). Often several sections are ...

  7. Capacitor types - Wikipedia

    en.wikipedia.org/wiki/Capacitor_types

    Vacuum tuning capacitors: Vacuum: Extremely low losses. Used for high voltage, high power RF applications, such as transmitters and induction heating. Self-healing if arc-over current is limited. Very high cost. Fragile. Large dimensions. SF 6 gas filled tuning capacitor: SF 6: Extremely low losses. Used for very high voltage high power RF ...

  8. Loop antenna - Wikipedia

    en.wikipedia.org/wiki/Loop_antenna

    A variable capacitor connected across the loop forms a resonant circuit that also tunes the receiver's input stage as that capacitor tracks the main tuning. A multiband receiver may contain tap points along the loop winding in order to tune the loop antenna at widely different frequencies.

  9. Tuned radio frequency receiver - Wikipedia

    en.wikipedia.org/wiki/Tuned_radio_frequency_receiver

    Within each compartment can be seen (from top): the triode tube, the interstage coupling coil, and the capacitor attached to its front panel tuning dial. The compartments contain (from left): the 4 RF stages, the detector stage, and the 4 tube audio amplifier. The capacitors could be linked to a common shaft and tuned together, or tuned separately.

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