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What is PLL used for?
A phase-locked loop (PLL) is an electronic circuit with a voltage or voltage-driven oscillator that constantly adjusts to match the frequency of an input signal. PLLs are used to generate, stabilize, modulate, demodulate, filter or recover a signal from a “noisy” communications channel where data has been interrupted.
How does PLL work?
The function of the PLL is to compare the distributed clock to the incoming reference clock, and vary the phase and frequency of its output until the reference and feedback clocks are phase and frequency matched.
What is the function of low pass filter is phase locked loop?
Definition. A PLL is a feedback system that includes a VCO, phase detector, and low pass filter within its loop. Its purpose is to force the VCO to replicate and track the frequency and phase at the input when in lock. The PLL is a control system allowing one oscillator to track with another.
What is PLL voltage?
The PLL voltage setting determines the voltage fed to the CPU’s phase locked loop section. The phase locked loop section generates the clock signals for different parts of the CPU that are clocked at different frequencies.
What is meant by PLL?
The phase-locked loop (PLL) block is a feedback control system that automatically adjusts the phase of a locally generated signal to match the phase of an input signal. PLLs operate by producing an oscillator frequency to match the frequency of an input signal.
PLLs are used for frequency control. They can be configured as frequency multipliers, dividers, demodulators , tracking generators or clock recovery circuits. On a computer motherboard a PLL is used to generate several frequencies that are required for proper operation:
What is a phase locked loop circuit?
Phase-locked loop. A phase-locked loop or phase lock loop ( PLL) is a control system that generates an output signal whose phase is related to the phase of an input signal. There are several different types; the simplest is an electronic circuit consisting of a variable frequency oscillator and a phase detector in a feedback loop.
What is a PLL tuner?
A PLL radio usually has a digital readout that accurately displays the receive frequency, and does not drift over time, something that a knob and dial radio can’t do very well. A communications receiver, like what Ham radio operators use, would almost be useless without a PLL tuner.