基于计算机PCI总线的虚拟信号源设计  

The Design of Virtual Multi-wave Signal Generator Based on PCI Bus

作　　者：仲元昌[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《计算机科学》2005年第6期230-232,共3页Computer Science

基　　金：重庆市教委教改基金(0027);重庆大学学科建设基金(0321)

摘　　要：虚拟仪器是基于个人计算机(PC)作为硬件平台的一种新型仪器,为了充分利用PC机的硬件资源,设计通用性强的虚拟仪器,研究了PCI总线的典型特点及专用接口芯片,建立了基于PCI总线的PCI板卡设计方法,并设计了“多波形信号发生器插卡”。实验结果表明:该设计方法充分利用了PCI总线高速的特点,将直接数字式频率合成器(DDS)软件化,能产生正弦波、三角波、方波、噪声、扫频及其它复杂波形。由该PCI卡构建的虚拟多波形信号发生器可以方便、准确地选择波形和调节波形参数,具有较强的通用性。The virtual instrument is a new-style instrument based on computer as hardware flat roof. In order to de- sign current virtual instrument with PC's hardware resource,PCI Bus and the interface chip are studied, the method of designing Add-In card is set up base on PCI bus, and the Add-In card of multi-wave signal generator is designed. Experimentation result show:the design method makes use of PCI bus' high speed features, DDS is realized by soft- ware. The signal generator can produce sin, triangle, square, noise, frequency sweep and others complex waves. The virtual multi-wave signal generator can be used to choose wave and to adjust its parameters conveniently and accurate- ly. It has rather strong current.

关 键 词：PCI总线 信号源设计 波形信号发生器 专用接口芯片 虚拟仪器 充分利用 设计方法 个人计算机 PCI板卡 直接数字式 硬件平台 硬件资源 PCI卡 波形参数 通用性 PC机 软件化 合成器 正弦波 三角波 特点 插卡 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] TN929.5[自动化与计算机技术—计算机科学与技术]