Frequency synthesizer

This study aims to provide a comprehensive view of prior literature and some possible directions for researchers and educators for further TPACK studies. A total of 106 papers were chosen from the Springer database and synthesized. Frequency of annual publications, number of documents with and without TPACK in the title.

10p viarnault 25-04-2024 1 1   Download

Food horticultural commodities are perishable products. Quality decreases rapidly after harvest. Therefore, timely handling and distribution of products must be considered to achieve customer satisfaction. The objective of this article is to analyze existing methods for logistics systems in food horticulture industrial products and develop new frameworks for smart logistics systems. This paper reviewed and synthesized 115 scientific articles published between 2009 and 2019.

14p longtimenosee07 29-03-2024 5 2   Download

Part 2 book "Modern communication circuits" includes content: Oscillators, phase locked loops, phase locked loop analysis, frequency synthesizers, power amplifiers, modulators and demodulators

335p muasambanhan06 01-02-2024 4 1   Download

Ebook "Digital frequency synthesis demystified" includes content: Introduction to frequency synthesis, frequency synthesizer system analysis, measurement techniques, DDS general architecture, phase locked loop synthesizers, accumulators,lookup table and sine ROM compression, digital to analog converters, synthesizers in use and reference generators, original paper and software,... and other contents.

355p haojiubujain07 20-09-2023 5 3   Download

ZnSe thin films were synthesized on glass substrates using the inert gas condensation technique at substrate temperature ranging from 25
C to 100
C. The hexagonal structure and average crystallite size (6.1e8.4 nm) were determined from X-ray diffraction data.

5p viberbers 09-08-2023 2 2   Download

A new parallel-plate capacitor fixture has been designed and successfully used to measure dielectric loss of polyelectrolyte solutions with volumes as low as droplets of 13e26 mL. It is particularly useful when studying polypeptides that are either high-cost or can be synthesized only in limited quantities.

6p viberbers 09-08-2023 4 3   Download

In this work, we carried out a study on NiTiO3 nanomaterial synthesized via citrategel method. The structural characteristics were determined by basic X-ray diffraction analysis. SEM analysis showed the surface morphology of the sample. The impedance spectra analysis was used to elucidate the dependence of complex impedance values on temperature and frequency.

12p vidudley 20-02-2023 6 2   Download

Highly porous Ti matrix composites can be a solution for some of the major clinical concerns for the load bearing implants such as low tribocorrosion resistance, stress shielding, and lack of biological anchorage. In order to respond to these needs, highly porous Ti-TiB-TiNx in-situ composites were synthesized by pressureless sintering using BN as reactant and urea as space holder. Corrosion behaviour was investigated at body temperature, in phosphate buffer saline solution (PBS), by measuring open circuit potential (OCP) and cyclic polarization.

12p tudichquannguyet 29-11-2021 12 1   Download

KGdF4 polycrystalline doped with the different concentration of Sm3+ ions were synthesized by hydrothermal technique. Thermoluminescence (TL) glow curves of samples were measured in the range from 50 oC to 400 oC after irradiating beta, neutron and X-ray radiations. The response of TL intensity to impurity concentration and neutron dose were studied in detail. The TL kinetic parameters such as activation energy (E) and frequency factor (s) were estimated by using the method of heating rate variation.

6p trinhthamhodang9 10-12-2020 14 1   Download

Nonaqueous liquid electrolyte system based dimethyl sulfoxide DMSO and magnesium bromide (MgBr2) is synthesized via ‘Solvent-in-Salt’ method for the application in magnesium battery. Optimized composition of MgBr2/DMSO electrolyte exhibits high ionic conductivity of 102 S/cm at ambient temperature. This study discusses different concentrations from 0 to 5.4 M of magnesium salt, representing low, intermediate and high concentrations of magnesium salt which are examined in frequency dependence conductivity studies.

8p kequaidan1 16-11-2019 11 0   Download

The interaction of metal oxide nanoparticles with plants has not been extensively studied. An attempt has been made to examine the potential variation in peanut plant leaves due to the application of Fe2O3 nanoparticle by pre-sowing technique and to compare with its bulk counterpart. Fe2O3 nanoparticle was synthesized by chemical route and characterized using X-ray diffraction, atomic force and scanning electron microscopy. The Fe2O3 nanoparticle and its bulk counterpart are applied to the peanut seeds by pre-soaking method at two different concentrations: 500 and 4000 ppm.

9p kequaidan1 16-11-2019 34 1   Download

Lecture "Radio Communication Circuits: Chapter 5&6" presents the following contents: RF Filters, Oscillators and Frequency Synthesizers (RF Oscilators, Voltage-Controlled Oscillators (VCO); Phase-Locked Loops (PLLs) and Applications). Invite you to consult.

65p doinhugiobay_12 15-01-2016 42 3   Download

A computer program for synthesizing Japanese fundamental frequency contours implements our theory of Japanese intonation. This theory provides a complete qualitative description of the known characteristics of Japanese intonation, as well as a quantitative model of tone-scaling and timing precise enough to translate straightforwardly into a computational algorithm. An important aspect of the description is that various features of the intonation pattern are designated to be phonological properties of different types of phrasal units in a hierarchical organization.

8p bungio_1 03-05-2013 33 1   Download

Over many years, RF-MEMS have been a hot topic in research at the technology and device level. In particular, various kinds of mechanical Si-MEMS resonators and piezoelectric BAW (bulk acoustic wave) resonators have been developed. The BAW technology has made its way to commercial products for passive RF filters, in particular for duplexers in RF transceiver front ends for cellular communications. Beyond their use in filters, micromachined resonators can also be used in conjunction with active devices in innovative circuits and architectures.

331p nguyenthai_thinh 16-03-2013 64 13   Download

As most readers know, evolutionary biology took off only after it was synthesized with population genetics in the 1920s and 1930’s (Fisher 1930). Mathematical treatments of allele frequencies that incorporated selection, drift, mutation, and migration made it possible to begin to understand the forces that shaped the genome. As Lewon- tin (1974) has noted, however, this theory developed separately from breeder’s theories about selection for phenotypes; the task of mapping changes in allele frequency to changes in phenotype remains a challenge.

6p thangbienthai 17-11-2012 45 0   Download

The term ‘microwaves’ is used for those wavelengths measured in centimetres roughly from 1 m. to 0.1 cm or the bands of frequencies between 300 MHz to 300 GHz. Microwaves are most popularly used in point to point communication, TV broadcasting via satellites and in RADAR systems. Besides these, they are also being used in industrial, biomedical, chemical and in scientific research applications. The latest wide acceptance of the microwave application is as “microwave heating” in synthesizing various compounds (organic and inorganic) in research laboratories as well as in industries....

382p nhatkyvodanh 24-07-2012 103 19   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Design and Characterization of a 5.2 GHz/2.4 GHz ΣΔ Fractional-N Frequency Synthesizer for Low-Phase Noise Performance

11p sting11 09-03-2012 51 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Noise and Spurious Tones Management Techniques for Multi-GHz RF-CMOS Frequency Synthesizers Operating in Large Mixed Analog-Digital SOCs

26p sting11 09-03-2012 40 4   Download

OSCILLATOR DESIGN Oscillator circuits are used for generating the periodic signals that are needed in various applications. These circuits convert a part of dc power into the periodic output and do not require a periodic signal as input. This chapter begins with the basic principle of sinusoidal oscillator circuits. Several transistor circuits are subsequently analyzed in order to establish their design procedures.

64p vaseline 30-08-2010 91 16   Download

The design is synthesized on the target device Spartan 3-3s200ft256-4. At first optimization goal is kept as speed. Then the number of slices used is 144 out of 1920(7%). Number of Slice Flip Flops used are125 out of 3840(3%). Number of 4 input LUTs are 261 out of 3840(6%). Total number of bonded IOBs used are 83 out of 173(47%).1 out of 8(12%) global clock is also used. As per timing analysis, maximum frequency of operation is 104.188 MHz.

10p babyuni 17-08-2010 59 2   Download