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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.
Circuit diagram symbol for a w:variable capacitor. Date: 3 June 2007: Source: Own work: Author: Jacj . This W3C-unspecified vector image was created with Inkscape ...
This work has been released into the public domain by its author, Momesana.This applies worldwide. In some countries this may not be legally possible; if so: Momesana grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
The prior art includes an RF MEMS frequency tunable fractal antenna for the 0.1–6 GHz frequency range, [18] and the actual integration of RF MEMS switches on a self-similar Sierpinski gasket antenna to increase its number of resonant frequencies, extending its range to 8 GHz, 14 GHz and 25 GHz, [19] [20] an RF MEMS radiation pattern ...
MEMS clock generators are MEMS timing devices with multiple outputs for systems that need more than a single reference frequency. MEMS oscillators are a valid alternative to older, more established quartz crystal oscillators, offering better resilience against vibration and mechanical shock, and reliability with respect to temperature variation.
Capacitors are divided into two mechanical groups: Fixed-capacitance devices with a constant capacitance and variable capacitors. Variable capacitors are made as trimmers, that are typically adjusted only during circuit calibration, and as a device tunable during operation of the electronic instrument. The most common group is the fixed capacitors.
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.
Hammarlund Comet Pro. The first Hammarlund plant was a loft operation engaged in radio component manufacturing on Fulton Street in Lower Manhattan, New York City.Their variable capacitor designs quickly became industry standards, and the component's schematic symbol was adopted as the company's logo.