Potentiometers, variable impedances

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NXP Semiconductors

Varicap diode - BB1xx series

Varicap diodes (or varactor or tuning diodes) are principally used as voltage variable capacitors,...

Varicap diode - BB1xx series

Varicap diodes (or varactor or tuning diodes) are principally used as voltage variable capacitors, with their diode function a secondary option. These small devices play an important role in a host of RF applications from tuning, frequency multiplier and modulation, to couple elements in filters with controlled bandwidth, parametric amplification and switching in the VHF and microwave regions.
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