数字扩音器的设计与实现  

Design and Implementation of Digital Amplifier

作　　者：吴晓云 WU Xiaoyun(College of Electronic Information and Electrical Engineering, Shangluo University, Shangluo 726000, Chin)

机构地区：[1]商洛学院电子信息与电气工程学院,陕西商洛726000

出　　处：《系统仿真技术》2018年第1期83-86,共4页System Simulation Technology

基　　金：2016国家级大学生创新创业训练计划项目(201611396016);2016年陕西省大学生创新创业训练计划项目(2690)

摘　　要：提出了低比特率数字扩音器的设计方案。该数字扩音器主要由电源电路、音量调整电路、音调调整电路、数字功放电路等4个部分组成。电源电路向设备提供功率,从而使设备运转,然后通过音量调整电路、音调调整电路和数字功放电路进一步驱动扬声器,最终实现音频放大、音调和音量调节等功能。实例验证结果表明:该数字扩音器具有电路简单、开发周期短、稳定性高等特点。A design scheme of lowbit rate digital amplifier is put forward in this paper.The digital amplifier is mainly composed of power circuit,volume adjustment circuit,tone adjustment circuit and digital power amplifier circuit.Power circuit provides the power for equipment,leading to the operation of equipment.Then the volume adjustment circuit,the tone adjustment circuit and the digital power amplifier circuit drive the speakers for the realization of audio amplifier and tone and volume adjustment.The digital amplifier has such advantages as simple circuit,short development cycle,high stability.

关 键 词：数字扩音器 抗干扰 音量调整 音调调整 D类功放 

分 类 号：TN722[电子电信—电路与系统]