数字存储示波器数据处理系统设计

基于传统单处理器系统有限的数据处理能力正逐渐成为示波器整机的瓶颈,作者设计了一种基于可编程系统芯片(System on programm ablech ip,SOPC)结构,用于1 GHz采样速率数字存储示波器(Digital storageos-cilloscope,DSO)的数据处理系统。系统中,根据模数转换器特征为其设计了具有数据缓存功能的接口单元;以A ltera Nios II/f软核为基础完成了专用微处理器的设计;针对DSO数据处理特征构建了4个并行处理电路;同时,系统还实现了液晶显示屏(LCD)的硬件驱动。SOPC结构的引入,使得该系统在具备强大数据处理能力的同时,具有低功耗和高集成度的特点。

DSP System for Digital Storage Oscilloscope

As digital storage oscilloscope(DSO) sampling rate raising rapidly,the traditional single-processor data processing system(DPS) is difficult to meet the present needs.A DPS based on the system on programmable chip(SOPC) is designed for DSO with 1 GHz sampling rate.In this DPS, an interface and two buffers are planned for the analog-to-digital converter; a special micro controller unit based on Altera Nios II/f soft core is designed;four parallel processing circuits are created to meet complex arithmetical operations of DSO.Additionally,a LCD driver circuit is implemented by the SOPC.The DPS has high performance,low power consumption,and considerable integration.