Armstrong oscillator

An Armstrong oscillator is a circuit designed to generate continuous radio frequency signals, typically used in radios and transmitters. It works by combining an electronic amplifier with a special tuned circuit called a resonant tank, which includes an inductor and capacitor. When powered, the circuit amplifies a tiny initial signal and feeds it back into itself at just the right frequency, causing the oscillations to sustain steadily. Essentially, it converts a small electrical disturbance into a stable, ongoing radio wave output, making it fundamental in generating the signals needed for communication systems.