A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input...

within which phase-locked loop-based circuits can achieve lock under various additional conditions. In the classic books on phase-locked loops, published...

difference in phase between two signal inputs. The phase detector is an essential element of the phase-locked loop (PLL). Detecting phase difference is...

channel. A frequency-locked loop is similar to a phase-locked loop (PLL), but only attempts to control the derivative of phase, not the phase itself. Because...

A PLL multibit or multibit PLL is a phase-locked loop (PLL) which achieves improved performance compared to a unibit PLL by using more bits. Unibit PLLs...

Charge-pump phase-locked loop (CP-PLL) is a modification of phase-locked loops with phase-frequency detectors and square waveform signals. A CP-PLL allows...

A Costas loop is a phase-locked loop (PLL) based circuit which is used for carrier frequency recovery from suppressed-carrier modulation signals (e.g...

can degrade the performance of phase-locked loops and RF integrated circuits. Injection pulling and injection locking can be observed in numerous physical...

frequency of oscillation depends on, or is constrained (i.e., phase-locked or mode-locked, in some contexts) based on some quantity, and it is often of...

(2025). "The Viterbi problem on coincidence of phase-locked loop lock-in, pull-in, and hold-in ranges". Nonlinear Dynamics. doi:10.1007/s11071-025-11040-3...

produced as a train of pulses. The laser is then said to be "phase-locked" or "mode-locked". Although laser light is perhaps the purest form of light,...

f_{out}={\frac {f_{in}}{N}}} where N {\displaystyle N} is an integer. Phase-locked loop frequency synthesizers make use of frequency dividers to generate...

Tavazoei, M.S. (2023). "The Gardner problem on the lock-in range of second-order type 2 phase-locked loops". IEEE Transactions on Automatic Control. 68 (12):...

modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input. A VCO is also an integral part of a phase-locked loop. VCOs are...

is the demodulated audio output. The phase-locked loop detector should not be confused with the phase-locked loop frequency synthesizer, which is often...

frequency division, direct digital synthesis, frequency mixing, and phase-locked loops to generate its frequencies. The stability and accuracy of the frequency...

separation of the two deviations is small, however, the phase locked loop will become less likely to lock on to the true signal for a larger percentage of the...

ADC(s). Phase lock loop circuits are particularly vulnerable because the VCO loop filter circuit is working with sub-microvolt signals when the loop is locked...

(2008), Phase Noise and Frequency Stability in Oscillators, Cambridge University Press, ISBN 978-0-521-88677-2 Wolaver, Dan H. (1991), Phase-Locked Loop Circuit...

be varied over some range by an input voltage or current. These voltage controlled oscillators are widely used in phase-locked loops, in which the oscillator's...

regarding dynamic range. In its original form it was unsuited to receiving AM and FM signals without implementing an elaborate phase locked loop. Although these...

as inputs as part of a chain of cause and effect that forms a circuit or loop. The system can then be said to feed back into itself. The notion of cause-and-effect...

at very high frequency to extend the upper frequency range of frequency counters, phase locked loop (PLL) synthesizers, and other counting circuits. When...

circuits. Graphene can work over a large frequency range due to its unique characteristics. A phase-locked loop (PLL) uses a reference frequency to generate...

energy references; the outputs can be used directly, or to synchronize phase-locked loop oscillators. It may be also used to generate a complete set of substitution...

oscillator by locking the output to a GPS signal via a tracking loop. The disciplining mechanism works in a similar way to a phase-locked loop (PLL), but...

The final solution to the synchronization problem came with the phase-locked loop. Once available, analog TVs, modems, tape drives, VCRs, and other...

a phase detector, a control-loop can be set up so that the VCO's output is frequency-locked to a crystal-controlled reference oscillator. The phase detector's...

a negative feedback loop is used to repeatedly correct accumulated quantization error during conversion. In a phase locked loop (1932), feedback is used...

simulated ground receiver used a phase-locked loop. The carrier reference generated by the VCO of the carrier phased-locked loop was used to heterodyne the...