##  [Phase-Locked Loop](/phase-locked-loop) 

  ##  [Phase-Locked Loop](https://engineering.quantumdictionary.io/phase-locked-loop-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A feedback control system that forces a local oscillator to follow the phase (and thereby frequency) of a reference signal by measuring phase error, filtering that error, and using the result to adjust the oscillator so that the phase difference converges to a small steady value.