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- Armstrong_oscillator abstract "The Armstrong oscillator (also known as the Meissner oscillator) is an electronic oscillator circuit which uses an inductor and capacitor to determine the oscillation frequency; an LC oscillator. It is the earliest oscillator circuit, invented by US engineer Edwin Armstrong in 1912 and independently by Austrian engineer Alexander Meissner in 1913, and was used in the first vacuum tube radio transmitters. It is sometimes called a tickler oscillator because its distinguishing feature is that the feedback signal needed to produce oscillations is magnetically coupled into the tank inductor in the input circuit by a "tickler coil" (L2, right) in the output circuit. Assuming the coupling is weak, but sufficient to sustain oscillation, the oscillation frequency f is determined primarily by the tank circuit (L1 and C, right) and is approximately given by This circuit was widely used in the regenerative radio receiver, popular until the 1940s. In that application, the input radio frequency signal from the antenna is magnetically coupled into the tank circuit by an additional winding, and the feedback is reduced with an adjustable gain control in the feedback loop, so the circuit is just short of oscillation. The result is a narrow-band radio-frequency filter and amplifier. The non-linear characteristic of the transistor or tube also demodulated the RF signal to produce the audio signal.The circuit diagram shown is a modern implementation, using a field-effect transistor as the amplifying element. Armstrong's original design used a triode vacuum tube.Note that in the Meissner variant, the LC resonant (tank) circuit is exchanged with the feedback coil, i.e. in the output path (vacuum tube plate, field effect transistor drain, or bipolar transistor collector) of the amplifier, e.g. Grebennikov, Fig. 2.8. Many publications, however, embrace both variants with either name; apparently the English speakers using Armstrong, and the German speakers Meißner.".
- Armstrong_oscillator thumbnail FET_Armstrong_oscillator.svg?width=300.
- Armstrong_oscillator wikiPageID "617327".
- Armstrong_oscillator wikiPageRevisionID "604725975".
- Armstrong_oscillator hasPhotoCollection Armstrong_oscillator.
- Armstrong_oscillator subject Category:Oscillators.
- Armstrong_oscillator type Artifact100021939.
- Armstrong_oscillator type Device103183080.
- Armstrong_oscillator type ElectronicDevice103277771.
- Armstrong_oscillator type Generator103434285.
- Armstrong_oscillator type Instrumentality103575240.
- Armstrong_oscillator type Object100002684.
- Armstrong_oscillator type Oscillator103857430.
- Armstrong_oscillator type Oscillators.
- Armstrong_oscillator type PhysicalEntity100001930.
- Armstrong_oscillator type Whole100003553.
- Armstrong_oscillator comment "The Armstrong oscillator (also known as the Meissner oscillator) is an electronic oscillator circuit which uses an inductor and capacitor to determine the oscillation frequency; an LC oscillator. It is the earliest oscillator circuit, invented by US engineer Edwin Armstrong in 1912 and independently by Austrian engineer Alexander Meissner in 1913, and was used in the first vacuum tube radio transmitters.".
- Armstrong_oscillator label "Armstrong oscillator".
- Armstrong_oscillator label "Generator Meissnera".
- Armstrong_oscillator label "Meißner-Schaltung".
- Armstrong_oscillator label "Oscilador Armstrong".
- Armstrong_oscillator label "Oscilador de Armstrong".
- Armstrong_oscillator label "Oscillatore Meissner".
- Armstrong_oscillator label "Генератор Армстронга".
- Armstrong_oscillator sameAs Meißner-Schaltung.
- Armstrong_oscillator sameAs Oscilador_Armstrong.
- Armstrong_oscillator sameAs Oscillatore_Meissner.
- Armstrong_oscillator sameAs Generator_Meissnera.
- Armstrong_oscillator sameAs Oscilador_de_Armstrong.
- Armstrong_oscillator sameAs m.02x2bx.
- Armstrong_oscillator sameAs Q283811.
- Armstrong_oscillator sameAs Q283811.
- Armstrong_oscillator sameAs Armstrong_oscillator.
- Armstrong_oscillator wasDerivedFrom Armstrong_oscillator?oldid=604725975.
- Armstrong_oscillator depiction FET_Armstrong_oscillator.svg.
- Armstrong_oscillator isPrimaryTopicOf Armstrong_oscillator.
