Search results
Results from the WOW.Com Content Network
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 ...
Vacuum tube regenerative receiver schematic. 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.
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.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
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 ...
A 5-tube superheterodyne receiver manufactured by Toshiba circa 1955 Superheterodyne transistor radio circuit circa 1975. A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.
AOL latest headlines, entertainment, sports, articles for business, health and world news.
Armstrong's solution was to set up an oscillator tube that would create a frequency near the incoming signal and mix it with the incoming signal in a mixer tube, creating a heterodyne or signal at the lower difference frequency where it could be amplified easily. For example, to pick up a signal at 1500 kHz the local oscillator would be tuned ...