PLL

Phase-Locked Loop

PLL is the acronym for Phase-Locked Loop.

A feedback control system that generates an output signal related to an input signal’s phase. It is a versatile electronic circuit used in a wide range of applications, including:

  1. Frequency Synthesis: PLLs are commonly used to generate stable and precise output frequencies. They can be found in devices like clock generators for microprocessors and digital communication systems.
  2. Clock Recovery: In data communication, PLLs recover the clock signal from a data stream, ensuring accurate data reception.
  3. Frequency Modulation and Demodulation: In FM modulation and demodulation, PLLs play a critical role in maintaining the carrier signal’s phase and recovering the modulating signal.
  4. Frequency Tracking: PLLs are used in radio receivers to track and tune to the desired frequency, ensuring the reception of a clear and stable signal.
  5. Phase Alignment: They are employed in applications requiring precise phase alignment or synchronization, such as in telecommunications and radar systems.
  6. Frequency Multipliers/Dividers: PLLs can multiply or divide input frequencies, making them useful for various frequency-related tasks.
  • Abbreviation: PLL
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