一种多音圈式全数字扬声器的设计与实现  

Design of a multi-voice-coil all-digital loudspeaker

作　　者：朱斌[1] 孙辰朔 沈静逸 刘山松 王颖[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《电子设计工程》2014年第2期64-66,70,共4页Electronic Design Engineering

基　　金：国家级大学生创新训练项目资助(201210610006)

摘　　要：提出了一种由USB数字音频接口、数字开关电流源电路和多音圈式换能器构成的数字扬声器设计方案。USB数字音频接口将WAV文件转换为并行数字信号输出,数字开关电流源电路根据数字信号控制相应位音圈的通断,多音圈式换能器按匝数权值实现电流到声音的转换。实验结果表明,在声音效果相同的情况下,和传统扬声器相比,数字扬声器具有低功耗,强抗干扰能力等优点,充分说明了该方案的可行性及良好的应用前景。In this paper, a design of all-digital loudspeaker, consisting of USB Audio interface, identical-current switch and multi-voice-coil transducer, was proposed. The USB section transmits data from WAV file to the parallel ports of switch circuit which functions as a controller of voice-coil＇s current. The transducer converts electronic signals into voice. The results of test show that while sharing the same voice quality of analog＇s, the digital loudspeaker consumes less energy with a better antiinterfere ability, and thus proves that this design is a feasible one expecting a good application.

关 键 词：全数字扬声器 USB数字音频接口 数字开关电流源电路 多音圈式换能器 

分 类 号：TN643[电子电信—电路与系统]