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

doi:10.1007/s12204-014-1568-5

上海交通大学学报（英文版） ›› 2014, Vol. 19 ›› Issue (6): 698-701.doi: 10.1007/s12204-014-1568-5

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

WU Hao (吴昊), SHEN Guo-feng* (沈国峰), SU Zhi-qiang (苏志强), CHEN Ya-zhu (陈亚珠)

(Biomedical Instrument Institute, School of Biomedical Engineering; Med-X Research Institute, Shanghai Jiaotong University, Shanghai 200030, China)

出版日期:2014-12-31 发布日期:2014-12-08
通讯作者: SHEN Guo-feng (沈国峰) E-mail: shenguofeng@sjtu.edu.cn

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

WU Hao (吴昊), SHEN Guo-feng* (沈国峰), SU Zhi-qiang (苏志强), CHEN Ya-zhu (陈亚珠)

(Biomedical Instrument Institute, School of Biomedical Engineering; Med-X Research Institute, Shanghai Jiaotong University, Shanghai 200030, China)

Online:2014-12-31 Published:2014-12-08
Contact: SHEN Guo-feng (沈国峰) E-mail: shenguofeng@sjtu.edu.cn

摘要/Abstract

摘要： Abstract: 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 2 ns, 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

Abstract: Abstract: 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 2 ns, 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.

Key words: high intensity focused ultrasound (HIFU), power amplifier, field programmable gate array (FPGA), signal generator, harmonic cancellation

中图分类号:

R 318.6

WU Hao (吴昊), SHEN Guo-feng* (沈国峰), SU Zhi-qiang (苏志强), CHEN Ya-zhu (陈亚珠). A New Full Bridge High Intensity Focused Ultrasound Power System with Harmonic Cancellation[J]. 上海交通大学学报（英文版）, 2014, 19(6): 698-701.

WU Hao (吴昊), SHEN Guo-feng* (沈国峰), SU Zhi-qiang (苏志强), CHEN Ya-zhu (陈亚珠). A New Full Bridge High Intensity Focused Ultrasound Power System with Harmonic Cancellation[J]. Journal of shanghai Jiaotong University (Science), 2014, 19(6): 698-701.

参考文献

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[5] Tang S C, Clement G T. A harmonic cancellation technique for an ultrasound transducer excited by a switched-mode power converter [J]. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control,2008, 55(2): 359-367.
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[7] Ikeda H, Suzuki T, Hayeiwa K, et al. Output power and efficiency tradeoff in full-bridged MOSFET power inverter for use at shortwave frequencies [C]//Industry Applications Society Annual Meeting. Dearborn, USA:IEEE, 1991: 965-970.
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A New Full Bridge High Intensity Focused Ultrasound Power System with Harmonic Cancellation

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

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