噪声整形在1bit D/A变换中的应用  

Application of noise shaping in1bit D/A conversion

作　　者：王康华 王鑫 

机构地区：[1]山东省广播电视局科技处,山东济南250011

出　　处：《电声技术》2003年第6期7-10,共4页Audio Engineering

摘　　要：主要介绍噪声整形在1bitD/A变换中的应用。文中简述了D/A变换的电路组成,并提出为什么要引入噪声整形电路;分别介绍了噪声整形的两种主要方式,即比特流方式和MASH方式的工作原理,并详细阐述了1次、2次和3次噪声整形电路的原理和数学领域内的分析;比较了这两种方式的特点。T his article elaborates the use of noise shaping in1bit D/A converter.It simpl y describes the components of D/A converter circuit and brings forth the reason about the introduction of noise shaping.Then it expounds the operating princi ples of two primary modes in noise shaping:bit stream mode and MASH mode,elab orating the principles of the first,second and third noise shaping circuit and analyzing it in the maths field.It compares the characteristics of these two m odes,and indicates that1bit technique which uses the over sampling and noise s haping circuit will be more and more widely utilized.

关 键 词：噪声整形 D/A变换 比特流 MASH 

分 类 号：TN792[电子电信—电路与系统] TN912.3