Phase noise improvement techniques for wideband fractional-N synthesizers

Phase locked loops

Digital duty cycle correction for frequency multiplier

PHASE LOCKED LOOP AND ASSOCIATED METHOD FOR LOOP GAIN CALIBRATION

Loop filter with active discrete-level loop filter capacitor in a voltage controlled oscillator

Continuous coarse-tuned phase locked loop

System and method for controlling a voltage controlled oscillator

Frequency modulated microphone system

Systems and method involving fast-acquisition lock features associated with phase locked loop circuitry

Clock recovery circuit, related clock and data recovery circuit, receiver, integrated circuit and method

PLL circuit and operation method

Method for calibrating a frequency synthesiser using two-point FSK modulation

Wireless radio-frequency transmission apparatus

Oscillation circuit device

Phase error detection in phase lock loop and delay lock loop devices

Duty cycle corrector, semiconductor device including the same, and method of operating duty cycle corrector

Clock and data recovery circuit detecting unlock of output of phase locked loop

Clock recovery circuit, optical module, and clock recovery method

System and method for voltage-controlled oscillator calibration

Phase-locked loop device

SEMICONDUCTOR DEVICE, RADIO COMMUNICATION APPARATUS, AND CONTROL METHOD FOR SEMICONDUCTOR DEVICE

Reference-frequency-insensitive phase locked loop

Phase-locked loop circuit, data recovery circuit, and control method for phase-locked loop circuit

APPARATUS AND METHODS FOR REDUCING SUPPLY NOISE CONVERSION TO PHASE NOISE

PLL circuit and operation method

Phase lock loop

PLL circuit, semiconductor device, electronic control unit, and control method of PLL circuit

System and method for a MEMS sensor

Phase detection circuit and signal recovery circuit that includes phase detection circuit

Duty-cycled gyroscope

Programmable frequency divider providing a fifty-percent duty-cycle output over a range of divide factors

FREQUENCY SYNTHESIZER CIRCUIT

Calibration of digital-to-time converter

LEAKAGE COMPENSATION CIRCUIT FOR PHASE-LOCKED LOOP (PLL) LARGE THIN OXIDE CAPACITORS

Phase-shifting a synchronization signal to reduce electromagnetic interference

Clock signal and supply voltage variation tracking

Circuits and methods for eliminating reference spurs in fractional-N frequency synthesis

METHODS AND SYSTEMS FOR CASCADED PHASE-LOCKED LOOPS (PLLS)

Charge pump circuit for a phase locked loop

Ring frequency divider

TRANSMITTER, TRANSCEIVER CIRCUIT, AND WIRELESS TRANSMITTING AND RECEIVING SYSTEM

Phase locked loop circuit and method of frequency adjustment of injection locked frequency divider

PHASE LOCKED LOOP WITH LOW PHASE-NOISE

Reducing errors due to non-linearities caused by a phase frequency detector of a phase locked loop

Resonator, phase-locked loop, and semiconductor integrated circuit device

Phase-rotating phase locked loop and method of controlling operation thereof

Phase locked loop frequency calibration circuit and method

CR oscillation circuit

Receiving device

High-reliability holdover method and topologies

Phase locked loop with sub-harmonic locking prevention functionality

Techniques for fractional-N phase locked loops

Phase locked loop using received signal

Resonant unit, voltage controlled oscillator (VCO) implementing the same, and push-push oscillator implementing a pair of VCOs

Display apparatus and driving method for the same

Phase switching PLL and calibration method

Semiconductor integrated circuit

High performance phase frequency detectors

Modulator, phase locked loop using the same, and method applied thereto

Clock and data recovery circuit and system using the same

Frequency synthesizing module and related frequency gain determining method

Phase locked loop and associated method for loop gain calibration

Phase detector and phase-locked loop

Variable frequency charge pump

Apparatuses and methods for providing oscillation signals

Phase frequency detector (PFD) circuit with improved lock time

Semiconductor device

Charge pump with suppressed feedthrough effect

High-reliability holdover method and topologies

CMOS oscillator having stable frequency with process, temperature, and voltage variation

Semiconductor device and phase locked loop including the same

Charge pump with matched currents

Charge pump circuit and phase lock loop circuit having the same

Methods related to frequency synthesis control

Systems and methods for configuring a semiconductor device

Frequency synthesizer for achieving fast re-lock between alternate frequencies in low bandwidth PLLs

Referenceless clock recovery circuit with wide frequency acquisition range

Receiving circuit

LOW NOISE PHASE LOCKED LOOPS

Charge pump circuit used for charge pump phase-locked loop

Phase locked loop having dual bandwidth and method of operating the same

Apparatus and methods for fast charge pump holdover on signal interruption

PLL frequency synthesizer with multi-curve VCO implementing closed loop curve searching

Multi-clock generation through phase locked loop (PLL) reference

Cross-channel data communication with data phase-locked loop

Integrated clock differential buffering

Self-calibrating shared-component dual synthesizer

Voltage controlled oscillator and phase locked loop including the same

Bimodal serial link CDR architecture

Dead-Zone Free Charge Pump Phase-Frequency Detector

Phase-locked loop filter with coarse and fine tuning

Phase locked loop circuit, phase locked loop module, and phase locked loop method

Frequency locking system

Differential charge pump

Variable frequency charge pump

Phase-detector circuit and clock-data recovery circuit

Clock and data recovery tolerating long consecutive identical digits

Communication system with charge pump mechanism and method of operation thereof

Area-efficient PLL with a low-noise low-power loop filter

Integrated clock differential buffering

Phase locked loop and semiconductor device using the same

Phase frequency detector and charge pump for phase lock loop fast-locking

DAC device and audio system

Phase locked loop circuit

Phase frequency detector circuit

Apparatuses and methods for providing oscillation signals

Data interface clock generation

Plesiochronous clock generation for parallel wireline transceivers

Phase locked loop with burn-in mode

Crystal oscillator emulator with externally selectable operating configurations

Apparatus and method to detect frequency difference

Double output linearized low-noise charge pump with loop filter area reduction

Data interface clock generation

Frequency synthesizer tuning

High-linearity phase frequency detector

Low jitter clock recovery circuit

Capacitor leakage compensation for PLL loop filter capacitor

Apparatus to remove the loop filter resistor noise in charge-pump PLL

Phase frequency detector and charge pump for phase lock loop fast-locking

Clock data recovery with out-of-lock detection

Configurable digital-analog phase locked loop

Circuits and methods for a combined phase detector

Phase lock loop with adaptive loop bandwidth

Delay locked loop

System and method of calibrating a phase-locked loop while maintaining lock

Leakage tolerant delay locked loop circuit device

Clock and data recovery for NFC transceivers

Circuit and method for controlling mixed mode controlled oscillator and CDR circuit using the same

Frequency-control circuits and signal generation devices using the same

Calibration device and related method for phase difference between data and clock

PLL bandwidth correction with offset compensation

Phase detector circuit for automatically detecting 270 and 540 degree phase shifts

Frequency tuning circuit, phase-locked loop circuit, communication apparatus, and storage apparatus

Integrated circuit

System incorporating power supply rejection circuitry and related method

Phase locked loop

System and method for adjusting a characteristic of a periodic signal with use of a filtered bias voltage

System, method and emulation circuitry useful for adjusting a characteristic of a periodic signal

System and method providing bandwidth adjustment in integral path of phase locked loop circuitry

System including circuitry providing multiple circuit paths for controlling a characteristic of a period signal

System including circuitry for controlling a characteristic of a periodic signal and method for adjusting a signal

Wide frequency range delay locked loop

System and method for reducing power consumption in a phased-locked loop circuit

Initialization circuit for delay locked loop

Phase locked loop and semiconductor device using the same

PLL circuit, communication device, and loopback test method of communication device

CHARGE-DISCHARGE DEVICE

Phase locked loop frequency synthesizer circuit with improved noise performance

Phase detector, phase detecting method, and clock-and-data recovery device

PVT consistent PLL incorporating multiple LCVCOs

System and method for reducing lock acquisition time of a phase-locked loop

Semiconductor integrated circuit having an on-chip PLL and operating method thereof

Device of phase locked-loop and the method using the same

Adaptive bandwidth phase-locked loop

Spread spectrum clock generator

Semiconductor memory device for controlling operation of delay-locked loop circuit

Low jitter clock recovery circuit

Clock data restoration device

Delay locked loop with offset correction

Radio communication apparatus

Multi-phase duty-cycle corrected clock signal generator and memory having same

Spread spectrum clock generating circuit

Method and apparatus for correcting phase offset errors in a communication device

Phase locked loop and method for operating the same

Phase-locked loop circuit

Clock data recovery circuit

Phase locked loop circuit including automatic frequency control circuit and operating method thereof

System and method for signal limiting

High frequency signal processing device

PLL CIRCUIT

Wide frequency range delay locked loop

Heterogeneous physical media attachment circuitry for integrated circuit devices

Programmable fine lock/unlock detection circuit

Open loop coarse tuning for a PLL

SEMICONDUCTOR INTEGRATED CIRCUIT

Phase-locked loop

System and method for reducing lock time in a phase-locked loop

Linear phase detector and clock/data recovery circuit thereof

Phase-combining circuit and timing signal generator circuit for carrying out a high-speed signal transmission

Phase frequency detector

Frequency Synthesizer

Fractional type phase-locked loop circuit with compensation of phase errors

Phase-locked loop systems using adaptive low-pass filters in switched bandwidth feedback loops

Multi-phase signal generator and method

Phase locked loop and method for operating the same

Configurable digital-analog phase locked loop

Method and apparatus for generating a sequence of clock signals

Phase locked loop including a frequency change module

Multi-phase duty-cycle corrected clock signal generator and memory having same

Digital phase-locked loops and frequency adjusting methods thereof

Timing vernier using a delay locked loop

Delay locked loop circuit

Charge transfer in a phase-locked loop

PLL circuit

Method and apparatus of phase locking for reducing clock jitter due to charge leakage

Semiconductor integrated circuit

Periodic signal synchronization apparatus, systems, and methods

Frequency synthesizer noise reduction

Phase synchronization apparatus

Dual phase detector phase-locked loop

PLL frequency synthesizer

PLL INTEGRAL CONTROL

Oscillation frequency control circuit, DC-DC converter including the oscillation frequency control circuit, and semiconductor device

Edge-missing detector structure

Clock data recovery circuit and multiplied-frequency clock generation circuit

Phase locked loop circuit with variable voltage sources

Clock and data recovery for differential quadrature phase shift keying

Device and method for phase synchronization with the aid of a microcontroller

Simplified bias circuitry for differential buffer stage with symmetric loads

SPREAD SPECTRUM CLOCK GENERATOR USING ARRIVAL LOCKED LOOP TECHNOLOGY

Phase locked loop circuit

PLL circuit and radio communication apparatus

Low voltage frequency synthesizer using boosting method for power supply voltage of charge pump

MEANS TO DETECT A MISSING PULSE AND REDUCE THE ASSOCIATED PLL PHASE BUMP

Band Selecting Method Applied to Voltage Controlled Oscillator of Phase Locked Loop Circuit and Associated Apparatus

RF transmitter with stable on-chip PLL

Clock signal generation circuit

Phase detector circuit for automatically detecting 270 and 540 degree phase shifts

Reference clock and command word alignment

Voltage-controlled oscillator, phase-locked loop, and memory device

Phase locked loop circuit, method of operating phase locked loop circuit and semiconductor memory device including phase locked loop circuit

Phase delay line

Phase detector circuitry

Techniques for minimizing control voltage noise due to charge pump leakage in phase locked loop circuits

Techniques for minimizing control voltage ripple due to charge pump leakage in phase locked loop circuits

Timing vernier using a delay locked loop

Intialization circuit for delay locked loop

Multi-phase duty-cycle corrected clock signal generator and memory having same

Semiconductor memory device for controlling operation of delay-locked loop circuit

Triple loop clock and data recovery (CDR)

Fast powering-up of data communication system

Multi-phase signal generator and method

FRACTIONAL RESOLUTION INTEGER-N FREQUENCY SYNTHESIZER

Differential signal driven direct-current voltage generating device

Baseband phase-locked loop

Fast powering-up of data communication system

Phase/frequency detector for a phase-locked loop that samples on both rising and falling edges of a reference signal

PLL FREQUENCY SYNTHESIZER

Frequency synthesizer for integrated circuit radios

Delayed-locked loop with power-saving function

PLL circuit, communication device, and loopback test method of communication device

Phase-locked loop system with a phase-error spreading circuit

Voltage-controlled oscillator circuit including level shifter

Phase locked loop with leakage current calibration

Method of Controlling Voltage-Controlled Oscillator

Frequency synthesizer

Phase synchronization apparatus

RF transceiver incorporating dual-use PLL frequency synthesizer

Phase frequency detector with pulse width control circuitry

High speed PLL clock multiplier

System and method for cycle slip prevention in a frequency synthesizer

Integrated ramp, sweep fractional frequency synthesizer on an integrated circuit chip

Arrival-Time Locked Loop

Phase comparator and regulation circuit

Voltage-controlled oscillator including plurality of delay cells

Phase locked loop with small size and improved performance

LOCKED-LOOP CIRCUIT

Thick oxide P-gate NMOS capacitor for use in a low-pass filter of a circuit and method of making same

Phase-locked loop

Phase lock loop apparatus

Bang-bang architecture

Phase synchronization circuit and receiver having the same

Frequency ratio detection

Single-ended to differential translator to control current starved delay cell bias

PLL circuit

Switching circuit in a phase locked loop (PLL) to minimize current leakage in integrated circuits

Delay locked loop circuit and method for eliminating jitter and offset therein

PLL circuit including voltage controlled oscillator having voltage-current conversion circuit

Hybrid Pll Combining Fractional-N & Integer-N Modes of Differing Bandwidths

Phase-combining circuit and timing signal generator circuit for carrying out a high-speed signal transmission

Clock synchronization circuit and operation method thereof

Charge pumping circuit, clock synchronization circuit having the charge pumping circuit, and method for operating the clock synchronization circuit

Dividing circuit and phase locked loop using the same

Phase and frequency detector with zero static phase error

Multi-mode transmit and receive PLL

DLL circuit, imaging device, and memory device

Phase locked loop circuit performing two point modulation and gain calibration method thereof

System and method for reducing lock time in a phase-locked loop

MULTI-BAND VOLTAGE CONTROLLED OSCILLATOR CONTROLLING MODULE, PHASE LOCKED LOOP UTILIZING WHICH AND RELATED METHOD THEREOF

OPTICAL DRIVER INCLUDING A MULTIPHASE CLOCK GENERATOR HAVING A DELAY LOCKED LOOP (DLL), OPTIMIZED FOR GIGAHERTZ FREQUENCIES

Frequency lock stability in device using overlapping VCO bands

Auto frequency acquisition maintenance in a clock and data recovery device

Clock signal generating circuit, display panel module, imaging device, and electronic equipment

Phase detection apparatus and phase synchronization apparatus

Delay locked loop circuit and semiconductor integrated circuit device

Zero-delay buffer with common-mode equalizer for input and feedback differential clocks into a phase-locked loop (PLL)

Jitter generator for generating jittered clock signal

Time delay apparatus

Phase locked loop including a frequency change module

Fractional-N frequency synthesizer

Loop filter, phase-locked loop, and method of operating the loop filter

Design structure for an automatic driver/transmission line/receiver impedance matching circuitry

Semiconductor integrated circuit

Design structures including multiple reference frequency fractional-N PLL (phase locked loop)

Delay-locked loop control

Start up circuit for delay locked loop

Method and system for signal generation via a PLL with DDFS feedback path

Apparatus and method for clock generation with piecewise linear modulation

Data driver circuit and delay-locked loop circuit

Time Delay Line with Low Sensitivity to Process Variations