An oscillator is an electronic component or system used to generate periodic signals. It usually consists of an oscillation circuit and oscillation components. The oscillation circuit can be a simple LC circuit (consisting of an inductor and a capacitor) or an amplifier and a resonant element (such as an oscillating diode or oscillating crystal). The working principle of an oscillator is to form a periodic energy conversion process by continuously transferring energy from one element to another.

Oscillators are used in a wide range of applications, such as producing high-frequency signals in radio communications, producing intermediate-frequency and ultra-high-frequency signals in televisions and broadcast receivers, and in electronic music and synthesizers. used to generate audio signals.