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A Colpitts oscillator, invented in 1918 by Canadian-American engineer Edwin H. Colpitts using vacuum tubes, [1] is one of a number of designs for LC oscillators, electronic oscillators that use a combination of inductors (L) and capacitors (C) to produce an oscillation at a certain frequency.
Edwin Henry Colpitts (January 19, 1872 – March 6, 1949) was a communications pioneer best known for his invention of the Colpitts oscillator.As research branch chief for Western Electric in the early 1900s, he and scientists under his direction achieved significant advances in the development of oscillators and vacuum tube push–pull amplifiers.
An active-filter tuned oscillator is an active electronic circuit designed to produce a periodic signal. It consists of a bandpass filter and an active amplifier, such as an OP-AMP or a BJT. The oscillator is commonly tuned to a specific frequency by varying the reactant of the feedback path within the circuit. An example is the Colpitts ...
Colpitts oscillator schematic of working circuit === Source of image === Created by Madhu as a screenshot. Date: 5 November 2010, 10:18 (UTC) Source:
Vacuum tube Seiler oscillator. The Seiler oscillator is an LC electronic oscillator. It was presented in 1941 by E. O. Seiler. [1] The original implementation used a vacuum tube in an Electron-coupled oscillator circuit. Like the Clapp oscillator and the Vackář oscillator it is a variation of the Colpitts oscillator. It uses a voltage divider ...
Simple relaxation oscillator made by feeding back an inverting Schmitt trigger's output voltage through a RC network to its 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.
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The Colpitts is distinguished in that feedback is taken from a capacitive voltage divider across the inductor. The Clapp oscillator has a capacitive voltage divider, but it is not across the inductor; there is an extra capacitor in there. Fig. 2 of the Colpitts patent clearly shows a capacitor voltage divider connected to the tube's cathode.