|Table of Contents|

Design and Implementation of Broadband Class-DUltrasonic Power Amplifier(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年01期
Page:
25-32
Research Field:
电子科学与技术
Publishing date:

Info

Title:
Design and Implementation of Broadband Class-DUltrasonic Power Amplifier
Author(s):
He Jianqiao; Li Yuzhi; Guo Gepu; Ma Qingyu; Ding Heping
School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
Keywords:
power amplifier; broadband; class-D; PWM style; ultrasound transducer
PACS:
TN837
DOI:
10.3969/j.issn.1672-1292.2020.01.005
Abstract:
In order to solve the problems of power,efficiency and heat dissipation for the phased transducer array in non-contact object manipulation and its practical applications in medical ultrasound,a PWM style class-D ultrasonic broadband power amplifier is designed and implemented. The waveforms of the resistive and resistant loads are collected to analyze the characteristics of the harmonic distortion,the load voltage and the output power. The measured results show that the class-D ultrasonic power amplifier can work in the medium and low frequency with the range from 20 kHz to 400 kHz. The maximum output power is up to 46 W with the efficiency higher than 78%. The class-D ultrasonic power amplifier has the advantages of low output resistance,easy resistance matching,high phase retention,low power loss and temperature rising. This design provides a basic circuit for the accurate driving of large-scale phased arrays,exhibiting prosperous applications in biomedical engineering.

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Last Update: 2020-03-15