基于FPGA的智能函数发生器设计  

Design of smart function generator based on FPGA

作　　者：孙晓昕[1] 陈凡非 吴鹏飞[1] 曲伟[1] 

机构地区：[1]黑龙江大学电子工程学院,哈尔滨150080

出　　处：《黑龙江大学工程学报》2015年第1期80-86,共7页Journal of Engineering of Heilongjiang University

基　　金：2012年黑龙江省研究生创新科研项目(YJSCX2012-317HLJ);2014年黑龙江大学研究生创新科研项目(YJSCX2014-074HLJU)

摘　　要：针对传统函数发生器设计的缺点,提出了一种智能函数发生器设计方法。该方法采用Qt设计上位机程序与USART串行通信技术相结合,实现对下位机的实时控制,兼顾了系统的灵敏度和鲁棒性。利用该方法设计了智能函数发生器模数转换模块、外部调制电路模块和滤波电路模块,并基于EP4CE6F17C8型FPGA芯片实现频率调制、幅度调制、偏置调制、波形调制以及占空比调制等功能。测试结果表明:该函数发生器能产生正弦波、方波、三角波、锯齿波等4种函数波形,其调频范围为1Hz^1MHz,调幅范围为-10V^+10V。A intelligent function generator design method was proposed according to the shortcomings of traditional function generator.The method used Qt to design upper computer program and used USART serial communication come true the real-time control to the lower computer.The sensitivity and robustness of the system were taken into account.The analog-digital converter modular,the external modulation circuit modular and the filter circuit modular were designed by this method,and functions of frequency modulation,amplitude modulation,offset modulation,waveform modulation,duty cycle modulation and so on were realized based on FPGA chip（EP4CE6F17C8）.From the experimental results：this function generator can produce sine wave,square wave,triangular wave and sawtooth wave.The frequency range was 1Hz to 1MHz and the amplitude modulation range was-10Vto＋10V.

关 键 词：现场可编程门阵列 直接数字频率合成 智能仪表 串行通信 

分 类 号：TP212.6[自动化与计算机技术—检测技术与自动化装置]