IEEE Organizations related to Synthesizers

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Conferences related to Synthesizers

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Periodicals related to Synthesizers

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Most published Xplore authors for Synthesizers

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Xplore Articles related to Synthesizers

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Frequency Synthesis Applications

Frequency Acquisition Techniques for Phase Locked Loops, None

This chapter contains sections titled:Direct Frequency Synthesis with Wadley LoopIndirect Frequency Synthesis with PLLsSimple Frequency Acquisition Improvement for a PLLHybrid Frequency Synthesis with DDS and PLLPhase Noise ConsiderationsPros and Cons of DDS-Augmented SynthesisMultiple LoopsReference Signal Considerations and FilteringSNR of Various Phase DetectorsPhase Detector Dead Band (Dead Zone) and RemediationSideband Energy due to DC Offset Following Phase DetectorBrute Force PLL Frequency ...


Architecture construction of frequency synthesizer and features modeling VCO

2013 23rd International Crimean Conference "Microwave & Telecommunication Technology", 2013

This paper presents the basic techniques in the construction of microwave synthesizers of the frequencies used in communication systems. The paper discusses the details of modeling of the VCO in NI Multisim software. Simulation was carried out to display visually VCO output characteristics.


Fractional-N frequency synthesizer at 24 GHz

2010 International Conference on Applications of Electromagnetism and Student Innovation Competition Awards (AEM2C), 2010

A fractional-N frequency synthesizer centered at 24 GHz is designed, which has a fast acquisition time. Different circuit schemes are chosen at different stages of frequency division to optimize its overall performance.


The Role of Charge Pump Mismatch in the Generation of Integer Boundary Spurs in Fractional-N Frequency Synthesizers: Why Worse Can Be Better

IEEE Transactions on Circuits and Systems II: Express Briefs, 2013

Fractional-N frequency synthesizers exhibit spurious tones (spurs). Spurs outside the loop bandwidth can be attenuated by the loop filter. By contrast, in-band spurs cannot be removed by filtering and are therefore a major cause for concern. The frequency-to-phase conversion of the output of a digital sigma-delta modulator followed by charge-pump mismatch is known to cause in- band spurs; larger mismatch ...


LNFS-RC low noise synthesizer with fixed output frequency

2013 23rd International Crimean Conference "Microwave & Telecommunication Technology", 2013

The fixed-frequency synthesizer that allows generating sine wave output signals synchronized with an internal or external reference in the microwave range with low phase noise. This synthesizer can be used as a source of reference signals for different radio systems, in particular for the direct digital frequency synthesizer (DDS).


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Educational Resources on Synthesizers

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IEEE-USA E-Books

  • Frequency Synthesis Applications

    This chapter contains sections titled:Direct Frequency Synthesis with Wadley LoopIndirect Frequency Synthesis with PLLsSimple Frequency Acquisition Improvement for a PLLHybrid Frequency Synthesis with DDS and PLLPhase Noise ConsiderationsPros and Cons of DDS-Augmented SynthesisMultiple LoopsReference Signal Considerations and FilteringSNR of Various Phase DetectorsPhase Detector Dead Band (Dead Zone) and RemediationSideband Energy due to DC Offset Following Phase DetectorBrute Force PLL Frequency Acquisition via SpeedupShort-Term and Long-Term SettlingN-over-MSynthesis

  • Architecture construction of frequency synthesizer and features modeling VCO

    This paper presents the basic techniques in the construction of microwave synthesizers of the frequencies used in communication systems. The paper discusses the details of modeling of the VCO in NI Multisim software. Simulation was carried out to display visually VCO output characteristics.

  • Fractional-N frequency synthesizer at 24 GHz

    A fractional-N frequency synthesizer centered at 24 GHz is designed, which has a fast acquisition time. Different circuit schemes are chosen at different stages of frequency division to optimize its overall performance.

  • The Role of Charge Pump Mismatch in the Generation of Integer Boundary Spurs in Fractional-N Frequency Synthesizers: Why Worse Can Be Better

    Fractional-N frequency synthesizers exhibit spurious tones (spurs). Spurs outside the loop bandwidth can be attenuated by the loop filter. By contrast, in-band spurs cannot be removed by filtering and are therefore a major cause for concern. The frequency-to-phase conversion of the output of a digital sigma-delta modulator followed by charge-pump mismatch is known to cause in- band spurs; larger mismatch is thought to make the problem worse. By considering a simplified nonlinear model of the mechanism, we show how larger mismatch can paradoxically make the spur problem disappear. We illustrate our predictions using a simplified MATLAB model and confirm them by simulation using the CppSim behavioral simulator.

  • LNFS-RC low noise synthesizer with fixed output frequency

    The fixed-frequency synthesizer that allows generating sine wave output signals synchronized with an internal or external reference in the microwave range with low phase noise. This synthesizer can be used as a source of reference signals for different radio systems, in particular for the direct digital frequency synthesizer (DDS).

  • An Ultra-Low-Jitter, mmW-Band Frequency Synthesizer Based on Digital Subsampling PLL Using Optimally Spaced Voltage Comparators

    This article presents a cascaded architecture of a frequency synthesizer to generate ultra-low-jitter output signals in a millimeter-wave (mmW) frequency band from 28 to 31 GHz. The mmW-band injection-locked frequency multiplier (ILFM) placed at the second stage has a wide bandwidth so that the performance of the jitter of this frequency synthesizer is determined by the GHz-band, digital subsampling phase-locked loop (SSPLL) at the first stage. To suppress the quantization noise of the digital SSPLL while using a small amount of power, the optimally spaced voltage comparators (OSVCs) are presented as a voltage quantizer. This article was designed and fabricated using 65-nm CMOS technology. In measurements, this prototype frequency synthesizer generated output signals in the range of 28-31 GHz, with an rms jitter of less than 80 fs and an integrated phase noise (IPN) of less than -40 dBc. The active silicon area was 0.32 mm², and the total power consumption was 41.8 mW.

  • Two-loop synthesizer of spectrum analyzerfrequency

    We consider a number of issues relevant to practical application of the microwave spectrum analyzer, which is made using a digital frequency synthesizer oscillator with a high resolution of (less than 1 Hz) and low phase noise. We developed a frequency synthesizer using a two-loop PLL synthesizer and direct digital synthesis (DDS) on the elemental basis of a high degree of integration, which allowed obtaining the required parameters, and providing multi-functionality and software-tunable operation for all elements and components of the spectrum analyzer.

  • All Digital Frequency Synthesis based on Pulse Direct Digital Synthesizer with spurs free output and improved noise floor

    This work presents Direct-Digital Frequency Synthesis architectures based on the classical Pulse-Direct Digital Synthesizer and using two quantization paths with opposite dithers or multi-path quantization with independent dithers to achieve spurs-free output with improved dynamic range. The proposed architectures are studied mathematically and the theory is supported by MATLAB simulation results.

  • Formation of microwave signals with small step of frequencies grid

    The method of forming of microwave signals with a small step of frequencies grid and improved noise characteristics is considered. This method is applicable to measurement technique, and also it solves problems of telecommunication, increasing the number of channel in microwave band.

  • Features of design frequency synthesizer for information systems

    The cardinal problem of designing and constructing frequency synthesizers is the inevitable rise in output noise when extending the frequency range. The aim of the research is to extend the PLL synthesizers frequency range that will be able to employ the sequential mode of functioning for radio communications, diagnostics and control systems.



Standards related to Synthesizers

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