scholarly journals Method for reducing phase fluctuations of a precision frequency response meter for microwave quantum generators

2021 ◽  
Vol 2086 (1) ◽  
pp. 012071
Author(s):  
M A Vodopyanov ◽  
K A Menzorov ◽  
V V Davydov ◽  
V Yu Rud
Keyword(s):  
Frequency Response ◽  
Block Diagram ◽  
Frequency Characteristics ◽  
Frequency Multiplier ◽  
Phase Fluctuations ◽  
Digital Frequency ◽  
Frequency Comparator ◽  
Improve Accuracy ◽  
Measuring Frequency ◽  
Precision Frequency

Abstract The principle of operation of the device for measuring frequency characteristics is considered. Block diagram of a device for measuring the frequency characteristics of a digital frequency comparator with correlation quadrature processing and description of their components is illustrated. The block diagram of the frequency multiplier is given. The accuracy characteristics of the developed meter design are evaluated. They are compared with the characteristics of previously used devices. The Improve accuracy characteristics and increased stability of operation were found.

scholarly journals Fast frequency response of inverter-based resources and its impact on system frequency characteristics

2020 ◽  
Vol 3 (5) ◽  
pp. 475-485
Author(s):  
Lining Su ◽  
Xiaohui Qin ◽  
Shang Zhang ◽  
Yantao Zhang ◽  
Yilang Jiang ◽  
...  
Keyword(s):  
Frequency Response ◽  
Frequency Characteristics ◽  
System Frequency

Digital Frequency Multiplying Method for the Power System Frequency Tracking Based on FPGA

2011 ◽  
Vol 328-330 ◽  
pp. 1747-1750
Author(s):  
Cui Yun Gao ◽  
Wen Jing Li ◽  
Ming Liu ◽  
Ru Han
Keyword(s):  
Power System ◽  
High Frequency ◽  
Interference Immunity ◽  
Frequency Tracking ◽  
Digital Frequency ◽  
System Clock ◽  
Hardware Realization ◽  
Improve Accuracy ◽  
Frequency Aliasing ◽  
System Frequency

The paper propose the digital frequency multiplying method based on frequency de-noising on FPGA, aiming at the frequency aliasing of the high frequency interference in the power system frequency tracking circuit. The basic principle and hardware realization are discussed.The performance of the system is tested using two different system clock, the experiments show that: This method can eliminate the error caused by frequency aliasing, and improve the interference immunity of the system. In addition, experiments also proved that using higher system clock can improve accuracy absolutely.

Dispersive optical fiber for measuring frequency response of electro-optical phase modulators

2013 ◽  
Vol 55 (4) ◽  
pp. 909-911
Author(s):  
Shangjian Zhang ◽  
Xiaobin Bao ◽  
Yali Zhang ◽  
Xiaoxia Zhang ◽  
Yong Liu
Keyword(s):  
Optical Fiber ◽  
Frequency Response ◽  
Optical Phase ◽  
Phase Modulators ◽  
Measuring Frequency ◽  
Optical Phase Modulators

scholarly journals Short vowels of the Teleut language for F1 and F2 (experimental phonetic observation)

2019 ◽  
pp. 58-65
Author(s):  
A. A. Dobrinina
Keyword(s):  
Spectral Analysis ◽  
Computer Program ◽  
Frequency Response ◽  
Spectral Composition ◽  
Frequency Characteristics ◽  
Short Vowels ◽  
Audio Files

This article presents the results of work to determine the spectral composition of the vowels of the teleutian lan-guage, based on data obtained in the field. The recorder was recorded in mp3 format, the data was converted to wav format using Freemake Audio Converter, Audacity program was used in the processing of audio files, the computer program SpeechAnalyzer was used in the decoding and analysis of materials. On the basis of spectral analysis, the vocalism of the Teleut language was determined. However, because of the sig-nificant oppositions of phonemes are the contrasts in abilitanti / albilineans and the extent of the solution. There are three types of vowels that differ in a number. Consideration of the frequency characteristics of high formants shows that when pronouncing the vowels of the front row e, and, ö, ʏ there is a significant increase in frequencies in the upper part of the spectrum. The vowels of the back row o, y, on the contrary, are characterized by a significant decrease in the sec-ond formant. The vowels a and u at frequency response is somewhere in the middle.

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