An electronic oscillator is a circuit that generates a repetitive electronic signal, often in the form of a sine wave or square wave. It converts direct current (DC) from a power source into an alternating current (AC) signal. Oscillators are essential in various applications, including clocks, radios, and signal generators. These devices can be classified into two main types: linear and nonlinear oscillators. Linear oscillators, such as LC oscillators and RC oscillators, use passive components to create oscillations, while nonlinear oscillators, like relaxation oscillators, rely on active components. Both types play crucial roles in electronics and communication systems.