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English: Diagram of an Armstrong oscillator circuit using a FET as the active device. The Armstrong oscillator, invented by Edwin Armstrong in 1913, was one of the earliest oscillator circuits. It is an LC oscillator, in which the frequency is determined by a tuned circuit consisting of the inductor L1 and capacitor C.
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 ...
English: Abstract block diagram of an electronic oscillator. It consists of an amplifying element with transfer function G(jω) with its output fed back into it's input through a feedback network with transfer function H(jω). The output voltage is labelled V o and the feedback voltage is labelled V f.
Oscillator block diagram.svg is the same image with A and β(jω) replaced with alternate variables G(jω) and H(jω). Oscillator diagram2.svg is the same image with the feedback loop shown broken, to show how loop gain is calculated.
VCOs can be generally categorized into two groups based on the type of waveform produced. [4]Linear or harmonic oscillators generate a sinusoidal waveform. Harmonic oscillators in electronics usually consist of a resonator with an amplifier that replaces the resonator losses (to prevent the amplitude from decaying) and isolates the resonator from the output (so the load does not affect the ...
Google Drawings is a diagramming software included as part of the free, web-based Google Docs Editors suite offered by Google. The service also includes Google Docs, Google Sheets, Google Slides, Google Forms, Google Sites, and Google Keep. Google Drawings is available as a web application and as a desktop application on Google's ChromeOS.
[5]: p.190 [11] Regeneration (now called positive feedback) is still widely used in other areas of electronics, such as in oscillators, active filters, and bootstrapped amplifiers. A receiver circuit that used larger amounts of regeneration in a more complicated way to achieve even higher amplification, the superregenerative receiver , was also ...
The Armstrong method generates a double sideband suppressed carrier signal, phase shifts this signal, and then reinserts the carrier to produce a frequency modulated signal. Frequency modulation generates high quality audio and greatly reduces the amount of noise on the channel when compared with amplitude modulation .