The gain of the amplifier must be sufficient to compensate for energy losses in the feedback loop.

Usually a transistor or operational amplifier that increases the signal strength.

The feedback signal must arrive back at the input in phase with the original oscillation.

Provides the necessary DC power to sustain the oscillations.

A standard electronic generator schematic generally includes several critical functional blocks:

Typically used for low-frequency applications. A well-known example is the Wien bridge circuit, which provides a stable sinusoidal output.