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phase-locked-loop frequency control

High Frequency Phase Detector in Phase Locked Loop

High Frequency Phase Detector in Phase Locked Loop

... the phase detector. Here the phase of the signals from the VCO and the incoming reference signal are compared and a resulting difference or error voltage is ...the phase difference between the two ...

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A Fast Locking Digital Phase-Locked Loop using Frequency Difference Stage

A Fast Locking Digital Phase-Locked Loop using Frequency Difference Stage

... two frequency counters and a difference ...input frequency during a fixed period and produces a 3-bit code proportional to the input ...to control the PCP output ...input frequency changes, ...

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DDS Based Phase Locked Loop

DDS Based Phase Locked Loop

... the phase and frequency, when the grid voltage is unbalanced and/or ...the control design guidelines for a typical MAF-based ...feedback control system, which synchronizes its output signal in ...

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A Review of Phase Locked Loop

A Review of Phase Locked Loop

... Digital frequency control is performed through the capacitor ...smaller frequency steps. The binary control word comprises an 8 bit integer part and bit fractional part ...

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Analysis of Phase Noise Profile of a 1.1 GHz Phase-locked Loop

Analysis of Phase Noise Profile of a 1.1 GHz Phase-locked Loop

... the frequency divider ...reference frequency, the PFD, the CP and the frequency divider are filtered at the PLL ...reference frequency to the VCO control voltage, the UP and DOWN ...

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Pseudo Linear Enhanced Phased-Locked Loop (PL-EPLL) based Control Algorithm for Three-Phase DSTATCOM in Three -Wire Power Distribution System

Pseudo Linear Enhanced Phased-Locked Loop (PL-EPLL) based Control Algorithm for Three-Phase DSTATCOM in Three -Wire Power Distribution System

... installed at point of common coupling (PCC) to attenuate the high frequency switching noise. The source voltages are considered as a stiff source with negligible feeder impedance. The VSC based DSTATCOM operate ...

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Self Synchronized Controller for Grid Connected Voltage Source Converter

Self Synchronized Controller for Grid Connected Voltage Source Converter

... invertersneed phase locked loop (PLL) to provide the phase, frequency and amplitude of the grid voltage as references to the ...the phase locked loop (PLL) by ...

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Volume 3, Issue 3, March 2014 Page 528

Volume 3, Issue 3, March 2014 Page 528

... Phase locked loop is an electronic circuit that controls an oscillator so that it maintains a constant phase angle ...the frequency of an input or reference signal. It is a ...

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Simulation of Analog Phase-locked Loop for Frequency Hopping Application

Simulation of Analog Phase-locked Loop for Frequency Hopping Application

... VCO control voltage and corresponding VCO generated carrier ...for frequency error behavior during frequency acquisition is carried out on the basis of difference between base carrier ...

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Design Technique of Phase-Locked Loop Frequency
          Synthesizer in CMOS Technology: A Review

Design Technique of Phase-Locked Loop Frequency Synthesizer in CMOS Technology: A Review

... the phase of the input signals, automatically raising or lowering the frequency of a controlled oscillator until it is matched to the reference in both frequency and ...a control system using ...

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Frequency and phase locking of a CW magnetron:with a digital phase locked loop using pushing characteristics

Frequency and phase locking of a CW magnetron:with a digital phase locked loop using pushing characteristics

... injection phase is ...the control input (base-band) applied to the electronic phase shifter, top trace in Figure ...5.2. Phase offsets due to the 50 Hz heater ripple and the 100 Hz mains ...

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Energy Efficient and High Speed Charge-Pump Phase Locked Loop

Energy Efficient and High Speed Charge-Pump Phase Locked Loop

... speed phase locked loop (PLL) . The main block of PLL is Phase Frequency Detector (PFD), Charge Pump (CP), Low pass filter and a Voltage controlled Oscillator ...The Phase ...

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STUDY AND IMPLEMENTATION OF PHASE LOCKED LOOP

STUDY AND IMPLEMENTATION OF PHASE LOCKED LOOP

... and frequency) with respect to references. When the PLL gets locked the phase error between output and input signal is zero or should remain at a constant phase ...the frequency of ...

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Phase Locked Loop Test Methodology

Phase Locked Loop Test Methodology

... known control signals directly to the charge pump ...and control signals referenced to a common time base are applied to the charge pump control ...oscillator frequency will be proportional to ...

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Title: Analysis and Design of a Three-Phase PLL Structure

Title: Analysis and Design of a Three-Phase PLL Structure

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

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A Low Power VLSI Design of an All Digital Phase Locked Loop

A Low Power VLSI Design of an All Digital Phase Locked Loop

... modulus control input and is always an integer power of 2. The frequency of the clock signal (K clock) is by definition M times the center frequency f0 of the ADPLL, where M is typically 8, 16, 32 ...

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VLSI BASED LOW POWER FRACTIONAL-N PHASE LOCKED LOOP FREQUENCY SYNTHESIZER FOR BLUETOOTH

VLSI BASED LOW POWER FRACTIONAL-N PHASE LOCKED LOOP FREQUENCY SYNTHESIZER FOR BLUETOOTH

... a phase detector. The output of phase detector is then applied to the low pass filter and used as a control signal to drive a ...its phase and frequency ...

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A Digital Phase Locked Loop Speed Control of Three Phase Induction Motor Drive: Performances Analysis

A Digital Phase Locked Loop Speed Control of Three Phase Induction Motor Drive: Performances Analysis

... target frequency received at pin 4 by the phase detector (PD) ...the phase error between two inputs ...supply) frequency which feeds the scalar control ...to control the power ...

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Design, Fabrication and Analysis of a 1.1 ghz Phase-Locked Loop Frequency Synthesizer for Wireless Communication Systems

Design, Fabrication and Analysis of a 1.1 ghz Phase-Locked Loop Frequency Synthesizer for Wireless Communication Systems

... cause frequency drift. Automatic frequency control (AFC) solved some of the drift problem, but manual retuning is often ...PLL frequency synthesizers is to generate precise and stable output ...

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Vol 3, No 11 (2015)

Vol 3, No 11 (2015)

... In this paper a fuzzy controller based DVR is proposed for the protection of the sensitive unbalanced nonlinear loads from sag/swell, distortion, and unbalance in supply voltage is achieved. This novel algorithm makes ...

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