Category: Phase-locked loops 

A phase-locked loop (PLL) is a feedback control system that synchronizes the phase and frequency of an output oscillator with a reference signal, effectively “locking” the two together. It continuously compares the phase of the reference with that of a voltage-controlled oscillator (VCO), generating an error signal that adjusts the VCO until both signals match in phase and frequency. Once locked, the PLL can track small variations, filter noise, multiply frequencies, or generate highly stable clock signals, making it indispensable in communication systems, microprocessors, radio receivers, and any application requiring precise timing and frequency control.

 

Components referencing this category:

 

Internal identifier: pll - Created: 2026-02-12 16:36:16