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随着音视频技术的发展,音频数模转换器DAC具有20位以上的分辨率,并采用Σ-Δ技术。20位以上的高分辨率DAC,只有音频器件而没有一般通用型,对于需要使用通用线性高分辨率DAC的场合,只有利用现有的音频DAC,采用外围电路的扩展进行改造。本文介绍音频DAC的基本原理及应用,并提出利用DSP对音频24位DAC进行通用性应用改造的电路及程序设计。
With the development of audio and video technology, audio DAC DAC with more than 20 bits resolution, and the use of Σ-Δ technology. More than 20 high-resolution DAC, only the audio device without the general-purpose type, the need for the use of general-purpose linear high-resolution DAC occasion, only the use of existing audio DAC, the use of peripheral circuits to transform the transformation. This article describes the basic principles of audio DAC and its applications, and proposed the use of DSP audio 24-bit DAC for universal application of circuit design and programming.