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What is PLL?
A phase-locked loop or phase lock loop (PLL) is a control system which generates a signal that has a fixed relation to the phase of a "reference" signal. A PLL circuit responds to both the frequency and the phase of the input signals, automatically raisin
total search199 articles
2004-04-12 Zarlink PLLs ensure reliable data transport
Zarlink has disclosed that its two digital PLLs deliver industry-leading jitter performance and superior features.
2002-01-25 Zarlink chip packs three PLLs to reduce signal wander
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2003-12-16 PLLs, DLLs becoming reusable IP
PLLs and DLLs are becoming increasingly important in the SoC design and are gradually turning into IP that can actually be reused by ordinary mortals.
2007-10-11 PLLs tailored for wireless, satellite applications
Analog Devices Inc. beefs up its portfolio once again with the release of the the ADF4157, a fractional-N PLL synthesizer.
2006-02-10 PLLs feature 'best spur performance'
National Semiconductor Corp. introduced the LMX248x family of high-performance, power-efficient PLLatinum delta-sigma phase-locked loops.
2007-08-01 Optimize FM transmission using digital PLLs
Digital PLL and DSP-based FM transmitters can overcome the drawbacks one can expect from using a conventional architecture by realizing frequency modulation, pre-emphasis, pilot tone and multiplexing in a pure digital domain.
2000-12-05 Offset reference PLLs for fine resolution or fast hopping
This application note discusses some alternative techniques of frequency synthesis using the Motorola MC145220 PLL IC, describes these techniques, and provides examples.
2003-04-09 National delta-sigma PLLs boast low power consumption
National Semiconductor Corp. has introduced a new family of delta-sigma fractional-N PLLs into its PLLatium portfolio of devices for use in cellular applications.
2006-12-07 Instrument tests clock circuits, PLLs, oscillators
Wavecrest is rolling out a family of instruments dubbed signal source analyzers for testing clock circuits, phase locked loops and oscillators.
2002-08-16 Hidden complexities of PLLs are revealed
Measuring PLLs in a quiet, low-noise environment can yield optimistic and misleading jitter results.
2016-01-21 In pursuit of quiet: Noise in linear regulators
It is always better to make sure the noise levels are low enough for your needs without expensive trials. Find out how this can be achieved.
2016-03-17 Achieve picosecond precision with FPGA techniques
When dealing with digital converters implemented on FPGA, you need to take important features into consideration to reach picosecond precision.
2006-09-13 VCSO suits telecom apps with low jitter requirements
Crystek has unveiled a 622.08MHz VCSO designed for high performance PLLs and suitable for telecommunications applications with low jitter generation requirements.
2002-04-19 Using the LOCK output from GIGA receivers
This application note explains the operation of the LOCK output from the PLLs of the high-speed devices from GIGA.
2009-05-13 LatticeECP3 sysCLOCK PLL/DLL design and usage guide
This application note describes the clock resources available in the LatticeECP3 device architecture. Details are provided for primary clocks, secondary clocks and edge clocks as well as clock elements such as PLLs, DLLs, clock dividers and more.
2009-01-21 Implementing PLL reconfiguration in Cyclone III devices
PLLs use several divide counters and different voltage-controlled oscillator taps to perform frequency synthesis and phase shifts.
2000-06-29 Frequency/Phase comparator for phase-locked loops
This application note describes a phase comparator that permits PLLs to be constructed using LCA devices, which only require an external VCO and integrating amplifier.
2007-04-09 Four-PLL spread-spectrum timing chip cuts EMI
Cypress Semiconductor introduced a four-PLL timing device with two spread-spectrum PLLs to reduce EMI.
2015-02-23 Configurable clock synthesiser touts low phase noise jitter
The XR81411 from Exar is capable of generating any frequency in the range of 10MHz to 800MHz with four independent PLLs, using a highly flexible delta-sigma modulator and a wide ranging VCO.
2001-04-26 An introduction to the PLL library
This application note describes where the PLL library fits in a design flow, and discusses the phase-domain models of PLLs.
2010-03-17 40nm 3PLDs pack 920 parallel I/Os, 48 transceivers
Tabula Inc. has launched its ABAX family of chips that integrate 5.5Mbyte RAM, 920 parallel I/Os and 44 PLLs.
2003-05-14 'Synthesis engines' roll out to speed up PLL designs
Barcelona Design has developed synthesis "engines" that are capable of generating PLLs for 0.15?m and 90nm CMOS processes.
2002-09-17 Zetex varactors fit low voltage systems
The ZV950 series of hyperabrupt varactor diodes is designed to meet the needs of 3V frequency control and filtering systems.
2002-09-13 Zarlink SAR ICs integrate PLL, SRAM
Zarlink Semiconductor has announced the immediate availability of what they claim to be the industry's two most highly integrated AAL1 segmentation and reassembly chips for TDM-to-ATM conversion.
2006-05-18 Xilinx unveils 65nm FPGAs
Xilinx announced its new Virtex-5 family of FPGAs, which is built on 65nm triple-oxide technology, ExpressFabric technology and advanced silicon modular block architecture.
2002-04-19 Xicor acquires analog design team for $15 million
To bolster its analog signal conditioning capabilities, Xicor Corp. has acquired the assets of Analog Integration Partners LLC, an engineering design team.
2008-06-02 Working on India's analog dream
Notes Anand Valavi of Wipro Technologies, " We want to get to the point where people think if they have some state-of-the-art analog work to be done, India is a good place to do it."
2015-05-26 Wideband RF synthesiser/PLL operates on low power
The 8V97051 contains an integrated voltage-controlled oscillator (VCO) with a large tuning range capable of providing multi-band local oscillator (LO) frequency synthesis.
2007-04-02 Wi-Fi/Bluetooth combos flood market
Wireless chipmakers have unleashed a barrage of similar-sounding products for cellular handsets that offer simultaneous support for Bluetooth and WLANs.
2006-07-20 Wi-Fi RF front-end chip reduces size, cost
Slated for Wi-Fi systems compliant with the IEEE-802.11b/g spec, the new RF front-end module from SiGe Semiconductor promises to cut system-level integration cost by about 15 percent.
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