CAJ | 학술논문

基于一款通用的16位定点数字信号处理器,结合D/A转换器、A/D转换器和放大器等模拟电路模块,设计并实现了一种面向音频应用的可配置片上系统.该系统支持立体声输入输出,具有8～48 kHz之间可编程的采样频率,以及可编程的输入输出放大器增益.同时,设计使用了24位高精度Σ-Δ A/D转换器,并配有可供选择的数字滤波器.为支持不同应用,系统提供24位或16位的可编程字长调节.系统芯片工作在1.8 V电压下,芯片内各部分支持挂起或睡眠状态,有利于低功耗的便携式应用开发.介绍了部分关键功能模块的仿真、验证和测试,以及整个系统仿真模型的建立.
기우일관통용적16위정점수자신호처리기,결합D/A전환기、A/D전환기화방대기등모의전로모괴,설계병실현료일충면향음빈응용적가배치편상계통.해계통지지입체성수입수출,구유8～48 kHz지간가편정적채양빈솔,이급가편정적수입수출방대기증익.동시,설계사용료24위고정도Σ-Δ A/D전환기,병배유가공선택적수자려파기.위지지불동응용,계통제공24위혹16위적가편정자장조절.계통심편공작재1.8 V전압하,심편내각부분지지괘기혹수면상태,유리우저공모적편휴식응용개발.개소료부분관건공능모괴적방진、험증화측시,이급정개계통방진모형적건립.
A configurable system on chip (SoC) for audio application was designed and realized based on a 16-bit fixed-point general-purpose digital signal processor (DSP) and analog modules, such as ADC, DAC and amplifier.This system enables stereo input and output, features a programmable sampling frequency from 8 kHz to 48 kHz and has programmable in-out-amplifiers gain.A 24-bit Σ-Δ ADC was used, as well as optional digital filters.Programmable DSPs were available between 24-bit and 16-bit for different applications.Operating at 1.8 V, each module on chip supports suspension- or sleep-mode, which is good for development of low power devices.Simulation, verification and test of key modules were described, as well as the establishment of simulation model.