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2011年全国电子信息技术与应用学术会议

作者： Jin TAN School of Electronic & Electric Engineering,Shanghai Second Polytechnic University,Shanghai,China

The AD9851 is a highly integrated device that have digitally programmable frequency synthesizer and clock generator *** referenced to an accurate clock source,the AD9851 generates a stable frequency and phase-programmable digitized analog output sine *** sine wave can be used directly as a frequency source,or internally converted to a square wave for gile-clock generator *** AD9851 does not require high-speed reference *** 6′ REFCLK Multiplier has minimal impact on SFDR and phase noise *** article is about the DDS chip AD8951 and MCU co-design a precision micro-short-wave signal generator feasibility *** outlines the basic principles,and focus on the description of the hardware point of *** the input clock signal is 12.6MHz,the maximum output frequency of up to 30.72MHz,to achieve a frequency,phase accurate output,and high *** design is suitable for the contemporary state of the art communications systems and precision instruments.

关键词： direct digital frequency synthesizer signal generator AD9851

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Study on signal generator for the Digital Coding Track Circuit

Study on Signal Generator for the Digital Coding Track Circu...

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ICEMI'2005第七届国际电子测量与仪器学术会议

作者： Wei Bing Wei Xueye Wang Liqing Sun Wei (School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China)

This paper studies the digital coding track circuit transmission based on FM (frequency modulation), and provides a transmission method by using a type of quadrature digital upconverter. A signal gene

关键词： signal generator FM DDS digital coding track circuit quadrature digital upconverter DSP.

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Construction of a broadband impedance spectrum and synchronous DC voltammetry measurement system for solar cells

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Journal of Measurement Science and Instrumentation 2024年第3期15卷 302-307页

作者： XIAO Wenbo LI Ao WU Huaming LI Yongbo College of Science and Technology Nanchang Hangkong UniversityJiujiang 332020China Key Laboratory for Optoelectronic Information Perception and Instrumentation of Jiangxi Province Nanchang Hangkong UniversityNanchang 330063China Key Laboratory of Nondestructive Testing of Ministry of Education Nanchang Hangkong UniversityNanchang 330063China

The current impedance spectroscopy measurement techniques face difficulties in diagnosing solar cell faults due to issues such as cost,complexity,and ***,a novel system was developed for precise broadband impedance spectrum measurement of solar cells,which was composed of an oscilloscope,a signal generator,and a sampling *** results demonstrate concurrent accurate measurement of the impedance spectrum(50 Hz-0.1 MHz)and direct current voltametric *** analysis with Keithley 2450 data yields a global relative error of approximately 6.70%,affirming the *** excitation signals(sine,square,triangle,pulse waves),sine wave input yields the most accurate data,with a root mean square error of approximately 13.3016 and a global relative error of approximately 4.25%compared to theoretical *** reference resistance expands the half circle in the impedance *** of reference resistance to that of the solar cell enhances the accuracy by mitigating line resistance *** error is lower in high-frequency regions due to a higher signal-to-noise ratio.

关键词： solar cell oscilloscope signal generator volt-ampere characteristics impedance spectrum

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A New Full Bridge High Intensity Focused Ultrasound Power System with Harmonic Cancellation

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Journal of Shanghai Jiaotong university(Science) 2014年第6期19卷 698-701页

作者：吴昊沈国峰苏志强陈亚珠 Biomedical Instrument Institute School of Biomedical Engineering Med-X Research Institute Shanghai Jiaotong University

The feasibility of a new full bridge high intensity focused ultrasound(HIFU) amplifier system with harmonic cancellation is evaluated in this study. Harmonic cancellation technique is applied to these power amplifiers, which can eliminate the 3rd harmonic and all even harmonics. Since this technique requires two channels of phase signal to control one channel of power amplifier, the signal generator is required to double its output. The transducer array proposed in this study has 100 elements. So we choose an FPGA chip to generate 200 driving signals, and each channel has a phase resolution of 2ns, less than 1°. The phase signal from the FPGA meets the requirement of driving the power amplifiers. The output waveform of one channel of power amplifier(voltage across the transducer) is evaluated, and shows fewer harmonic components.

关键词： high intensity focused ultrasound(HIFU) power amplifier field programmable gate array(FPGA) signal generator harmonic cancellation

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中国电子学会开放实验室将在全国发展专业研究室

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电子学报 1997年第10期 19-19页

中国电子学会开放实验室将在全国发展专业研究室为了更好地组织和团结社会各方面的力量，开展科学实验活动，对科研成果进行二次开发，扒动科研成果向生产力转化，促进企业的科技进步，中国电子学会开放实验室将在自愿互利的原则下，在... 详细信息

中国电子学会开放实验室将在全国发展专业研究室为了更好地组织和团结社会各方面的力量，开展科学实验活动，对科研成果进行二次开发，扒动科研成果向生产力转化，促进企业的科技进步，中国电子学会开放实验室将在自愿互利的原则下，在大专院校、科研院所、电子企事业单位...

关键词： signal generator Coding Programmable control

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