Voltage-controlled oscillator (VCO)

A voltage-controlled oscillator (VCO) is an electronic device that generates a repeating signal, like a radio wave, whose frequency (pitch) can be adjusted by varying an input voltage. Think of it as a musical instrument where changing the volume knob alters the pitch of the note produced. In many applications, such as communication systems and signal processing, the VCO's ability to quickly and precisely change frequency based on an electrical signal makes it a vital component for tuning, synchronization, and modulation tasks.