PLL

One important application of PLL in microprocessor is to provide on-chip clock for the system. It has been a core module of microprocessor.

Because of the better spur control than DDS, the Phase Locked Loop (PLL) frequency synthesis is usually used in frequency agile synthesis.

Compared with the structure of the commonly used PLL circuit, that of the circuit implemented by this way is simpler and easier to be made.

If the frequency offset is large enough, the traditional PLL cannot be locked. Such situation would lead to the system corruption.

The PLL includes a phase frequency detector, a charge pump, a low pass filter, a voltage controlled oscillator and a frequency divider .

Therefore, a more thorough analysis of the output jitter, taking into account optimal loop bandwidth selection, is provided in this paper.

The objective of the thesis is to explore the noise sources in PLL and find the proper circuit structures to reduce the noise effects.

Application of the hardware PLL technology can achieve the synchronous sampling more effectively and help improve the sampling accuracy.

USPIO-PLL, as an intracellular contrast agent, can label endothelial progenitor cells with high efficiency.

The second local frequency signal is provided by an integer-divider after PLL output.

When coincidence between horizontal sync and oscillator frequency is detected, the search mode is replaced by a normal PLL operation.

A switched varactor array is proposed to suppress tuning gain fluctuation for the performance of the phase locked loop (PLL).

A fast locking phase-locked loops (PLL) with a dual-slope phase frequency detector circuit is presented.

Considering the characteristics of PLL, the dual self-excited driving circuits for capacitance micro-machined gyroscope are designed.

The technology of PLL has always been the research emphasis in the field of measurement and control of power system.

DDS hybrid PLL can take good advantage of both their merit, have become an important area of frequency synthesis.

The design of PLL, AGC, IQ and impedance mATched parts are analyzed. The implement of the circuit and the test result are provided.

The signal processing circuses , including the low-noise pre-amplifier, the filter and the phase lock loop(PLL) demodulation were designed.

A detailed discussion about the hardware design including PLL, DLL of the GPS signal acquisition and tracking is focused on.

of Phase Frequency Detector (PFD) and modifying the rest of the PLL blocks.

A novel detection method of power quality disturbance based on an improved phase-located loop (PLL) system is brought forward in this paper.

But if the Doppler frequency offset exceed the capture range of PLL, the carrier synchronization will fail.

The core instrument for frequency-following is the PLL. The DSP is used to realize the regulating of the dead time on-line.

A computer aid analysis method for PLL of block-linking type facing systematic mathematical models is proposed.

Changes in the minimum pulse width can adversely effect a PLL's static phase offset and performance characteristics.

PLL is used for generating carry synchronization signal.

The PLL can provide a very wide frequency range as the input clock is fixed.

PLLs have many applications in integrated circuits ranging from agile frequency synthesis and clock recovery circuits.

AD1896 (Analog Devices) - selected for its low spurious tones, low distortion, and exceptionally low PLL corner frequency.

The automatic tuning system in a PLL technique is simply introduced.

The PLL circuit has been designed in the controller to meet the requirement of high-speed and accurate sampling.

Digital PLL and digital filter are built based on conventional double closed-loop control which contains voltage loop and current loop.

A high-order phase-locked loop(PLL) for radio frequency synchronization is designed.

Operation theory and realization method of stator-flux-angle in engineering based on digital phase-locked-loop (PLL) are presented.

At signal tracking aspect, first, the elements of code loop and carrier loop was proposed based on the basic phase-locked loop (PLL).

The tune measurement systems in the BEPC storage ring by using PLL are introduced in this paper.

for keeping the frequency and phase synchronous to the grid , a pll ( phase locked loop ) is necessary.

PLL is a close loop control system, it is used to high precision frequency and phasic control.

The phase locked loop (PLL) frequency synthesizer for digital tuning system(DTS), which is used in DTS of car radio receiver, is presented.

How will it be happened when IO port is set to output and internal PLL HIGH?

Based on the simulation, the PLL sweep signal resource has been designed, and then we have debugged and tested the signal source.

In the end, using emulation mode to verify the available of the new PLL.

FIG. 1 illustrates an example of a phase-locked loop (PLL) that can include techniques of the present invention.

In transmitter circuit, the frequency source is realized by the method of PLL, and frequency stepping is realized the same time.

In order to indentify the validity of the designing and simulation technique deeply, a S band PLL frequency synthesizer was designed.

The PLL is designed based on CPLD, this type PLL has the quality of high precision, high speed locked and wide locked range.

In this article, PLL theory, design of loop filter and phase noise theory are introduced at first.

In order to ensure the speed of transmitter, the PLL motor speed control methods and contactless power supply was used.

The X98014's digital PLL generates a pixel clock from the analog source's HSYNC or SOG (Sync-On-Green) signals.

Besides acting on PLL, her dream role is to play a Bond girl. Yes please!

Now the full integrated pll( phase locked loop ) chip is used widely in radio frequency circuit.

It is based on an improved DDS PLL synthesis method.

An analysis of the PLL how to affect the control system are took, and make a study and simulation on power frequency fluctuations.

Before we can setout to find the optimal configuration for our PLL, we need to first consider how we find any configuration for our PLL.

Two kinds of PLL are working in microprocessors today: mixed-signal PLL and digital PLL.

As a result, a minimum pulse that is too wide can introduce more offset into the PLL loop.

In order to makes full use of the advantages of DDS and PLL, a project based on DDS PLL is adopted in the radar signal resource.

The delayed pulse jitter is reduced and the exact delay time is obtained by using the PLL.

A Simple and Reliable Scheme for High-speed Wideband Lock Protection Circuit in Mixing PLL and its Engineering Design

A Study of the Functions of the Two-rank PLL Nonlinear Capture and Nonlinear Tracing

Improvement of the PLL voltage-frequency-narrow pulse converter and its application

CMOS Implementation of a Wideband Low Phase Noise PLL Frequency Synthesizer

Analysis of Stable Operation Range and Frequency Acquisition Process for PLL Speed Control System with Sample-and-hold Phase Detector

Analysis of the Frequency Acquisition Process for PLL Speed Control System with Sample-and-hold Phase Detector

Programmable PLL and its Application in Frequency Synthesizer

Application of a PLL Combining DDS Reference in Modern Radio Design

Analog Devices RF Portfolio Expansion Continues With New High-Resolution PLL For Wireless Applications

The Theoretical Study on PLL Full Synchronization Video Detector Circuit in Large Screen Colour Television

Chaos and Subharmonic Bifurcations for a Family of PLL Equations

An Adaptive Harmonic Current Calculation Arithmetic for APF Using PLL-Produced Reference Voltage

Special PLL used in target RF simulation of the radio detonator

Nonlinear Function of Higher-order PLL and Its Improvement

System Level Design and Simulation of a Third Order Charge Pump PLL

Analog Devices Strengthens RF Portfolio With New PLL Synthesizer Products And Software Design Tool

A CMOS Digital PLL with a New Phase-frequency Detection Technique

Improving PLL tracking of ultrasonic vibration resonant frequency

Research of Changeable Frequency-Band PLL in Frequency Hopping (FH) Communication

Model on DSP-Based PLL-Controlled Superaudio Induction Heating Power Supply Simulation

The Researches on Capturing and Tracking Characteristics of Color TV PLL Video Detector

Design of an Charge Pump PLL Circuit for Wireless transceiver

Demodulation of Frequency-Shifting Signals of Automatic Block System with PLL

Applications of PLL for Micro-hard Disk Servo Writing to Follow the Motor Rotate Speed

The Correlation of Reproduction-Related Gene Expression with Germ Cell Number in DM and PLL Gilts

Full band pll TV tuner, preset channel up to 250 ch

Accurate Phase Noise Prediction and Simulation in PLL Synthesizers

PLL full synchronization video detector technique in new color TV receivers

Design and Realization of a Normal Frequency Phase Difference Tester Based on PLL

Analysis of Scanning Acquisition Technique and Performance in PLL

Design of charge-pump circuit with positive feedback complementary CMOS for PLL

The Research on PLL Control Circuit for Induction Heating Power Supply Inverter

Design of a fast- lock PLL with adaptive control

Analysis and SPICE Simulation of Substrate Crosstalk in Mixed-signal IC Digital PLL

Application of Digital PLL Circuit in Synchronous Control of Low Frequency

Event-Driven Simulation of the CP-PLL in Frequency Hopping Systems

Chaos from PLL of Digital Synthesizer with Trigon Sampling Phase-Detector

Optimum design value for spur suppression ratio in rapid frequency hopped PLL

Analysis and Simulation of Lock Process in PLL Frequency Synthesizer

Computer-Aided Design of Fractional-N PLL Frequency Synthesizer

Design and Realization of a Clock Phase Interpolator Circuit Based on PLL

The application of PLL technology in mobile communication

For instance, PLL frequency jump synthesizer for carrier wave;

PLL All-synchronous Video Detection Technology

The Problems To Be solved By PLL Designing

CMOS Implementation of RF PLL Frequency Synthesizer

Design of Low Phase-noise Microwave PLL Frequency Synthesizer

Design of PLL Frequency Synthesizer for Digital Tuning System

A PLL Frequency Synthesizer with High Multiple-Frequency

Application of PLL on Single- Phase Series Resonant Inverter

An Advanced Fractional-N PLL Frequency Synthesizer

The Application of PLL for Intelligent Ultrasonic Power

Restraint for PD Leakage without Damaging the PLL Stability

Application of PLL in Modulate and Demodulate Circuits

High accuracy electrical motor control system with PLL

New Broken Number Frequency Division Theory Based on Swallowing Pulse PLL Frequency Synthesizer

Novel Processing Method of High-Precision Heterodyne Interference Signals Based on PLL Frequency-Mixing

Application of PLL to the Phase Symmetry of Three-phase Inverter

PLL-QPSK, phased-locked loop quadrature phase shift keying

Application of PLL in Synchronous Digital Network over SDH

Low Phase Noise and Spurious Digit PLL's Frequency Synthesizer

High performance, low noise PLL clock multiplier

Design of High - performance Charge - pump Circuit in PLL

To measure vehicle rotary speed cleverly with digital PLL

Application of PLL in the City Traffic Information System

Design of a High Bit Rate PLL FM Demodulator

A New Method for Improving Accuracy of PLL Jitter Measurement

Elimination of ECT system's additional phase shift error by PLL

A Phase Frequency Detector without Dead Zone for High Speed PLL

Analysis of Phase Noise in Digital PLL Synthesizer

Realization of Preventing PLL Improper Locking Based on Spectrum Analysis Using DDS

Design of Pseudo-noise Code PLL in High Dynamic Condition

Novel Charge Pump Design for Fast Locking Time PLL

A Fast Acquisition PLL with Wide Tuning Range

An Arbitrary Frequency- Conversion Technology Based on PLL

The realization of synchronized phasor measurement unit based on GPS and PLL

Tracking Time in a Nested-loop PLL for Pico-satellite

Design of a High Stability Light Chopper Based on PLL

Study on PLL-FM And Demodulation System

Tune measurement in the BEPC storage ring by using PLL

design and realization of pll frequency synthesizer based on mc

Design and Implement the Frequency Synthesizer Based on DDS and PLL

An At-Speed Scan Test Scheme Using On-Chip PLL

Some Thoughts about How to Select PLL Bandwidth of Phase Lock Receiver

Fluid Infusion Speed Monitoring System Based on PLL

A method of frequency measuring and PLL tracking based on AC sampling

Research on a Novel Motor Flux Observer Based on PLL

Design of PLL System Based on Mixed-Signal Simulation

The Research on Vector Control Model without Sensorof Based on PLL Principle

An Realization for Signal Generator Based on PLL

A System of Measuring Displacement Based on MPU and PLL Technology

The Selection Criterion of PLL IP Core Based on Jitter

Key tehndogys in mixing PLL design

Novel Motor Stator Flux observer Based on PLL

A True Random Number Generator Based on PLL

Research on Sensor-less Vector Control of PMSM based on PLL Mode

DDS is Used as PLL's Program Divider

The Development of FM Transmitter Based on PLL