ETC EngineeringMCQs
Home › Analog Electronics › A PLL is said to be locked when the VCO output and reference have?
MCQ Practice Question
Analog ElectronicsOscillators & PLL

A PLL is said to be locked when the VCO output and reference have?

  • AA constant phase relationship and the required frequency relationship
  • BRandomly changing frequencies
  • CExactly zero amplitudes
  • DNo feedback connection
Report an error
Correct Answer: A. A constant phase relationship and the required frequency relationship
Explanation: In lock, feedback maintains the required frequency relationship and the phase error settles to a constant value appropriate to the loop.
Reference: Standard analog electronics: PLL lock
Continue practicing: Analog Electronics MCQs or browse all MCQs.