Phase-Shift Oscillator

A phase-shift oscillator is an electronic circuit that generates continuous sine wave signals, like smooth, repetitive waves. It works by amplifying an electrical signal and feeding it back into itself through a network that shifts the signal's phase by exactly 180 degrees. When combined with the amplifier's gain, this creates a loop that sustains the oscillation without external input. The phase-shift network typically uses resistors and capacitors to produce the needed phase shift, resulting in a stable, pure tone. This type of oscillator is commonly used in audio applications, test equipment, and signal generation.