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The Armstrong oscillator [1] (also known as the Meissner oscillator [2]) is an electronic oscillator circuit which uses an inductor and capacitor to generate an oscillation. The Meissner patent from 1913 describes a device for generating electrical vibrations, a radio transmitter used for on–off keying. Edwin Armstrong presented in 1915 some ...
Most regenerative receivers used this Armstrong circuit, in which the feedback was applied to the input (grid) of the tube with a "tickler coil" winding on the tuning inductor. The gain of any amplifying device, such as a vacuum tube , transistor , or op amp , can be increased by feeding some of the energy from its output back into its input in ...
It is an LC oscillator, in which the frequency is determined by a tuned circuit consisting of the inductor L1 and capacitor C. In the Armstrong circuit, a little of the energy from the output of of the transistor, the feedback necessary for oscillation, is fed back into the input (gate) circuit by a small coil L2 , called the " tickler coil ...
In 2011, Armstrong's net sales were $2.86 billion, with operating income of $239.2 million. [17] Armstrong Cabinets was sold by Armstrong World Industries to American Industrial Partners on October 31, 2012. Armstrong spun off its flooring business into a new company, Armstrong Flooring (NYSE: AFI) on April 1, 2016.
Armstrong Flooring is a Pennsylvania corporation incorporated in 2016. It was spun off as an independent entity from Armstrong World Industries in April 2016. The company manufactures flooring products in the US in Beech Creek, Pennsylvania; Jackson, Mississippi; Kankakee, Illinois; Lancaster, Pennsylvania; South Gate, California; and Stillwater, Oklahoma; and internationally in Shanghai ...
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New Year's Day marks the third time the Kyoto Tachibana Senior High band will perform at Rose Parade. Bands from Mexico, Panama and Denmark will march too.
Crystal oscillators can be manufactured for oscillation over a wide range of frequencies, from a few kilohertz up to several hundred megahertz.Many applications call for a crystal oscillator frequency conveniently related to some other desired frequency, so hundreds of standard crystal frequencies are made in large quantities and stocked by electronics distributors.