摘要
有针对性地提出了一种可程控高精度信号源实现方法,该方法以16位高精度D/A为核心构建波形重构电路,以单片机和FPGA的组合实现总体控制。利用单片机集成的16位高精度A/D构建了反馈校正模块,通过该模块建立了一个闭环控制系统,有效改善了系统的整体精度。该方法将单片机技术、FPGA技术进行有机的结合,充分发挥了各自的优点。此外,应用USB总线技术和高速异步串行总线技术可完成波形数据的实时下载,即实现了信号源的实时可编程。测试结果表明,该信号源精度达到0.01%,满足设计要求,性能稳定可靠。
A new method about programmable signal generator with high precision is put forward in this paper, in which the wave reconstruction circuit is designed with the core of 16 bits high precision D/A converter and the collectivity control is realized with combination of microcomputor and FPGA. The whole precision of the system is improved by establishing a closed loop controlled system with the high precision A/D converter of 16 bit integrated on microcomputor. In this method, microcomputor and FPGA technology were combined effectively and made the best use of their merits. Furthermore, with the bus technologies such as USB and high speed asynchronous serial communication, the wave data can be downloaded in real time, that is to say this signal source can be programmed in real time. The test result indicates that the precision of this signal generator is 0.01%, which satisfies the design demand and is reliable and stable.
出处
《电测与仪表》
北大核心
2008年第3期51-54,共4页
Electrical Measurement & Instrumentation
关键词
波形重构
D/A转换器
高精度
闭环控制
wave reconstruction, D/A converter, high precision, closed-loop control
作者简介
甄国涌（1971-），男，汉族，副教授，兵器系统工程专业，主要从事嵌入式系统设计、动态测试、总线等领域的研究。
赵慧（1984-），女，汉族，山东曹县人，中北大学硕士研究生，精密仪器及机械专业，主要从事动态测试、微系统及集成技术、数据处理等方面的研究。Email：zhaohui0028@163．com
刘宁（1981-），男，汉族，中北大学硕士研究生，测试计量技术及仪器专业，主要从事存储测试、数据处理与传输等方面的研究。
