基于PCM1794的纯音频解码器的设计与实现  

作　　者：张志永 孔惠敏 朱涛 夏清华 

机构地区：[1]湖北文理学院物理与电子工程学院,湖北襄阳441053

出　　处：《科技创新与应用》2018年第32期87-89,共3页Technology Innovation and Application

摘　　要：设计并实现了一个基于PCM1794的音频解码器。纯音频解码器是一种用于Hi-FI听音的支持USB音频输入的设备。主要作用是把读取的数字音频信号转换成模拟音频信号输出,供功率放大后重放。设计以PCM1794DAC数模转换器为核心,介绍了电源模块、DAC数模转换模块、I/V转换模块、功率放大模块的设计原理。该设计较高的输出信噪比和较小的失真效果明显的提高了音质。An audio decoder based on PCM1794 is designed and implemented.A pure audio decoder is a device that supports USB audio input for Hi-Fi listening.The main function is to read the digital audio signal into analog audio signal output for power amplification and playback.The design takes PCM1794DAC digital-to-analog converter as the core,and introduces the design princi ples of power module,DAC digital-to-analog module,I/V conversion module and power amplifier module.The design has higher out put signal-to-noise ratio(SNR)and less distortion,which can obviously improve the sound quality.

关 键 词：PCM1794 数模转换 信噪比 

分 类 号：TN764[电子电信—电路与系统]