一种脉宽调制型功率放大器的研究及应用  

Development of a PWM Power Amplifier and Its Application

作　　者：李伟东[1] 梁剑波[1] 庞佑兵[1] 王若虚[1] 

机构地区：[1]中国电子科技集团公司第二十四研究所,重庆400060

出　　处：《微电子学》2007年第4期584-587,共4页Microelectronics

摘　　要：基于PWM理论,设计了一种脉宽调制型功率放大器。该放大器采用典型的RC起振电路产生三角波,输入指令电压和三角波相比较后,生成PWM信号作为驱动/控制电路的输入信号,驱动/控制电路的输出信号用来控制四个功率MOS管的开启或关闭。这四个MOS管组成一个H功率全桥。该放大器具有输出电流大、输出效率高、抗干扰能力强等特点。以对电机的驱动和控制为例,简单介绍了电路的实际应用。Based on the operational theory of pulse-width modulation （PWM）, a power amplifier was designed, in which a typical RC oscillator was used to generate triangle waves. By comparing the triangle wave with an order voltage signal, a PWM signal was generated, which was used as input signal of the drive-controller circuit. And the output signal of the driver-controller was used to control 4 power MOSFET＇ s, of which the H-bridge was comprised. The amplifier features high output current and efficiency, and it is insensitive to useless signals. Application of the amplifier in motor drive and control is described.

关 键 词：脉宽调制 功率放大器 H功率桥 

分 类 号：TN453[电子电信—微电子学与固体电子学]