一种新型任意信号发生器的设计与实现

A New Design and Implementation of Arbitrary Waveform Signal generator

摘要:

为了适应电子技术的发展,需要产生结构复杂,具有特殊功能的任意波形,文章在传统的函数信号发生器的基础上,提出了一种基于DDS技术,通过主控芯片DSP和数模转换芯片相结合,使用七阶椭圆低通滤波器作为信号调理电路的总体硬件电路设计,软件上采用函数式生成函数波形数据和上位机采样生成任意波形数据,能够产生至少30 kHz的标准函数波形以及最高频率1 kHz的复杂任意波形；通过测试,该方案具有可行性,易于实现,适合在科研和生产中使用。 

Abstract:

In order to adapt to the development of electronic technology and the need to generate complex,arbitrary waveform with special features,on the basis of the traditional function of the signal generator,the paper proposes a design scheme which is based on DDS technology,through the master chip DSP and digital to analog converter chip combining the use of seven order elliptic low-pass filter as the overall hardware circuit design .The software design uses functions to generate sampled waveform data and PC software to generate arbitrary waveform data to achieve not only can produce at least 30 kHz the standard function waveform also can produce the highest frequency complex arbitrary waveform of 1 kHz. Through testing,the program which is feasible and easy to implement is suitable for use in scientific research and production.