一种高性能低噪声数据采集卡的设计

基金项目:

国家自然科学基金资助项目（60805028），山东省自然科学基金资助项目（Y2008G31），济南市高校自主创新项目（200906005）

Design of a Data Collection Card with High Performance and Low Noise

1.College of Information and Electrical Engineering of Shandong University of Science and Technology, Qingdao 266510, China. 2.Baodian Coal Mine of Yanzhou Coal Mining Co., Ltd., Zoucheng 273500, Chin

摘要: 针对目前国内USB接口的数据采集产品存在精度低、采样率低、数据传输速率低的问题，设计了一种高性能低噪声数据采集卡。该数据采集卡采用高速差分放大器AD8132进行前置放大；采用CPLD和SRAM构成大容量FIFO；采用USB2.0总线技术进行数据传输；采用独立时钟为CPLD和AD转换器提供精确的同步时钟信号，从而降低时钟相位噪声；采用VC++设计上位机应用程序，用于分析和处理数据。测试结果表明，该数据采集卡具有噪声低、传输速率快、精度高等优点。
- 数据采集卡 /
- 低噪声 /
- 高性能 /
- USB
Abstract: In view of problems of low precision, low sampling rate and low data transmission rate existed in current data collection products based on USB interface in China, a data collection card with high performance and low noise was designed. The card uses high-speed differential amplifier AD8132 to make preamplifier; uses CPLD and SRAM to compose large capacity FIFO; uses USB2.0 bus technology to transmit data; uses independent clock to provide accurate synchronous clock signal for CPLD and AD converter to reduce clock phase noise; uses VC++ to design application program of upper computer to realize data analysis and processing. The test result showed that the card has advantages of low noise, rapid transmission rate and high precision.
- data collection card, low noise, high performance, USB /