摘要
设计了一种脉冲宽度调制的H桥超声发射电路,该电路由PWM电路、H桥功率放大电路、低通滤波电路组成。该发射电路具有结构简单、输出功率高、可对大部分的波形进行调制发射、易于多通道拓展的优点。通过对该电路进行仿真和实际电路的测试,证明所产生波形满足设计要求,并可以用于超声探测和成像系统。
In this paper, a H bridge ultrasonic transmitting circuit with pulse width modulation is designed, which is composed of PWM circuit, H bridge power amplifier circuit and low-pass filter circuit. The circuit has the advantages of simple structure, high output power, and can modulate the majority of the waveform, easy multi-channel expansion. Through the test of the circuit and the actual circuit, it is proved that the waveform meets the design requirements and can be used for ultrasonic detection and imaging system.
出处
《电子技术应用》
北大核心
2015年第10期126-128,132,共4页
Application of Electronic Technique
基金
国家自然科学基金资助项目(41075115)
江苏省重点研发计划(社会发展)项目(BE2015692)
