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RF and microwave filter. Radio frequency (RF) and microwave filters represent a class of electronic filter, designed to operate on signals in the megahertz to gigahertz frequency ranges ( medium frequency to extremely high frequency ). It is component that is used in electronic systems to pass or reject specific frequencies and attenuate of ...
Yttrium iron garnet spheres ( YIG spheres) serve as magnetically tunable filters and resonators for microwave frequencies. YIG filters are used for their high Q factors, typically between 100 and 200. [ 1][ 2] A sphere made from a single crystal of synthetic yttrium iron garnet acts as a resonator. The field from an electromagnet changes the ...
History. GE Appliances was originally a part of General Electric, a company which began marketing a full roster of heating and cooking products in 1907. [ 7] In January 2004, it became part of GE Consumer & Industrial when GE Consumer Products (founded in 1905) merged with GE Industrial Systems (founded in 1930) to form GE Consumer & Industrial.
General Electric in Schenectady, New York, aerial view, 1896 Plan of Schenectady plant, 1896 [19] General Electric Building at 570 Lexington Avenue, New York. During 1889, Thomas Edison (1847–1931) had business interests in many electricity-related companies, including Edison Lamp Company, a lamp manufacturer in East Newark, New Jersey; Edison Machine Works, a manufacturer of dynamos and ...
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A vacuum tube, electron tube, [ 1][ 2][ 3] valve (British usage), or tube (North America) [ 4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a ...