Design Techniques for Direct Digital Synthesis Circuits with Improved Frequency Accuracy Over Wide Frequency Ranges

Leitner, Stefan; Wang, Haibo; Tragoudas, Spyros

doi:10.1142/s0218126617500359

Cited by 10 publications

(6 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Аналіз останніх досліджень і публікацій. На цей час видано значну кількість праць щодо питань частотного синтезу, наприклад [4][5][6][7]. У роботах [5; 8] викладено принципи побудови і схемотехнічні рішення цифрових обчислювальних синтезаторів, побудованих на основі методу прямого цифрового синтезу частот і сигналів.…”

Section: вступunclassified

Обґрунтування Варіанту Побудови Збудника Привідної Радіостанції

Рисаков¹,

Кулик²,

Костенко³

et al. 2021

soivt

View full text Add to dashboard Cite

У роботі розглядається один з можливих підходів до побудови збудника привідної радіостанції у складі цифрового синтезатора частот діапазону високих частот і перетворювача частот синтезатора у діапазон робочих частот радіостанції. Запропонована оптимальна схема побудови синтезатора частот на основі фазового автоматичного підстроювання частоти генератора, що управляється напругою, під частоту кварцового опорного генератора. Обґрунтовуються алгоритм отримання дробово-змінного коефіцієнту ділення частоти і схема побудови імпульсно-фазового детектора в кільці фазового автоматичного підстроювання частоти генератора, що управляється напругою.

show abstract

Section: вступunclassified

Обґрунтування Варіанту Побудови Збудника Привідної Радіостанції

Рисаков¹,

Кулик²,

Костенко³

et al. 2021

soivt

View full text Add to dashboard Cite

show abstract

“…In practical applications, different excitation frequencies should be applied to improve the accuracy of flow measurement according to the different properties of the fluid. The filtering method can be optimized in the system and the automatic tracking frequency filtering technology can be successfully realized [27], [28].…”

Section: ) Signal Channelmentioning

confidence: 99%

Electromagnetic Flow Detection Technology Based on Correlation Theory

Huang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

When the electromagnetic flowmeter (EMF) is applied to the industrial field, the effective flow signal of the electrode output is easily drowned out by the noise under the condition of strong noise and flow rate lower than 0.2 m/s. However the flow signal drowned out in strong noise cannot be measured accurately by traditional electromagnetic flow detection technology, which cannot separate signal and noise effectively. The correlation technology can be applied to select the reference signal with the same regularity as the target signal to separate the target signal and remove the noise. Firstly, researches on the correlation detection and the basic correlation theory of the electromagnetic flowmeter are carried out. Then, the design of the electromagnetic flow measurement system based on the theoretical research is completed. Finally, in order to verify the performance and accuracy of the designed flow measurement system, a test platform for electromagnetic flow detection is set up, and the verification experiments are implemented. The experiment results show that the electromagnetic flow measurement system based on the correlation theory can not only meet the requirements of traditional flow measurement but also have unique advantages in suppression of strong noise interference, slurry flow measurement, and low flow rate measurement.

show abstract

“…Compared with the traditional frequency synthesis technology, DDS has the advantages of short frequency conversion time, high frequency resolution, easy integration, high reliability and easy debugging [7]- [10]. With the continuous improvement of DDS technology, its application fields are more and more extensive, such as aerospace, surveying and mapping, guidance, satellite positioning and high-speed communications and other high-tech fields, just as shown in Fig.1 [11]- [14].…”

Section: Introductionmentioning

confidence: 99%

“…There are usually two ways to design and implement frequency synthesizer based on DDS technology, using DDS chip or FPGA [6]- [8], [14]- [16]. Chip-based frequency synthesizers can achieve higher integration.…”

Section: Introductionmentioning

confidence: 99%

A Suppressing Method for Spur Caused by Amplitude Quantization in DDS

Tang

Hou

2019

IEEE Access

View full text Add to dashboard Cite

Direct digital synthesis (DDS) technology is widely used in navigation, communications, aerospace, and other fields. Due to the technical limitations in the process of DDS digitization, the output spectrum of DDS is inevitably spurious. In order to meet the requirement of the pure frequency reference signal for modern instrument or equipment, it is necessary to correctly analyze the spur of DDS and effectively suppress it. In this paper, the causes of the spur in traditional DDS are analyzed, and a piecewise linear approximation method is proposed to suppress the amplitude quantization spur of DDS. In order to verify the effectiveness of the proposed spurious suppression method in this paper, the MATLAB simulation is carried out and a field programmable gate array (FPGA) hardware platform for DDS is developed. The simulation and actual test results prove the feasibility of this method. In the limited storage space, this method improves the accuracy of amplitude quantization, reduces spurs, and enhances the accuracy of synthetic frequency.

show abstract

Design Techniques for Direct Digital Synthesis Circuits with Improved Frequency Accuracy Over Wide Frequency Ranges

Cited by 10 publications

References 21 publications

Обґрунтування Варіанту Побудови Збудника Привідної Радіостанції

Обґрунтування Варіанту Побудови Збудника Привідної Радіостанції

Electromagnetic Flow Detection Technology Based on Correlation Theory

A Suppressing Method for Spur Caused by Amplitude Quantization in DDS

Contact Info

Product

Resources

About