This paper discusses a code converter which converts A-Law PCM to Adaptive Syllable Companding DM ( ADM) and from ADM to A-Law PCM. In order to perform the conversion, we adopt a kind of special filter-multirate filter. 本文讨论了一种码变换器,它实现了A律PCM与音节压扩DM(ADM)间的码型变换,该变换采用了一种特殊滤波器(多速率数字滤波器)。
The radiation models of DM current and CM current in cables and radiative characteristics of cables and high frequency current loops in the converter are also discussed. 在功率变换器辐射EMI方面,系统地讨论了功率变换器各辐射源的特点,重点分析了共模电流和差模电流在电缆中的辐射模型,功率变换器中电缆与高频电流回路的辐射性能。