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Blocking oscillator. Basis of solid-state Blocking oscillator. The waveform generated by this circuit. This Joule thief circuit, a blocking oscillator, can be used in order to power a light-emitting diode from a 1.5V battery for a relatively long period of time, with the brightness being a tradeoff.
In 2005, United Airlines and Ameco signed a 5-year deal for heavy maintenance work on the entire fleet of 55 Boeing 777s. The relationship expanded in 2010, when another 5-year contract was signed, including both the Boeing 747s and 777s fleets. In the same year, Aeroflot signed a deal to send line check work on 4 Boeing 767s to Ameco.
A voltage-controlled oscillator ( VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input.
An electronic oscillator is an electronic circuit that produces a periodic, oscillating or alternating current (AC) signal, usually a sine wave, square wave or a triangle wave, [1] [2] [3] powered by a direct current (DC) source. Oscillators are found in many electronic devices, such as radio receivers, television sets, radio and television ...
Leeson's equation. Leeson's equation is an empirical expression that describes an oscillator 's phase noise spectrum. Leeson's expression [1] for single-sideband (SSB) phase noise in dBc/Hz (decibels relative to output level per hertz) and augmented for flicker noise: [2] where f0 is the output frequency, Ql is the loaded quality factor, fm is ...
Antiresonance. In the physics of coupled oscillators, antiresonance, by analogy with resonance, is a pronounced minimum in the amplitude of an oscillator at a particular frequency, accompanied by a large, abrupt shift in its oscillation phase. Such frequencies are known as the system 's antiresonant frequencies, and at these frequencies the ...
ECO oscillator schematic. In the vacuum-tube radio, an electron-coupled oscillator or ECO oscillator uses a screen-grid tube with the cathode, control grid and screen grid forming the elements of the frequency-generating circuit while the plate is in the output circuit, shielded from the oscillator circuit proper by the screen grid.
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