文档介绍：简易波形合成电路的设计与实现
李灿,王成跃,杨卫
南京医科大学生物医学工程系,南京210029
摘要本文主要设计一个能够合成指定波形的信号波形发生电路,该电路基于傅里叶合成,能够产生不同频率的正弦信号,将这些信号处理后送入加法电路可合成所需信号,主要由方波产生模块产生方波,分频与滤波模块对所得方波分频并滤成正弦波,放大模块对所得正弦波幅值进行放大,移相模块调整各频率正弦波相位,信号合成模块合成所需波形。
关键词:波形合成;分频滤波;移相
The Design and Implementation of Simple Waveform Synthesis Circuit
Li Can, Wang Chengyue, Yang Wei,Zhu Songsheng,Wang Wei*
Department of Biomedical Engineering, Nanjing Medical University, Nanjing210029,China
Abstract This paper mainly designs a signal waveform generating circuit that can synthesize designated waveform. Based on Fourier, it can produce various frequency sine signals. After processing, these sine signals can be synthesized designated signal through addition circuit.
Among the circuit, the square wave generating module produces square-wave, and the square-wave is divided frequency and filtered into sine wave though frequency separating and filtering modules. After that, the amplifier module magnify the amplitude of the sine wave obtained. Then phase shifting module adjusts the amplification of each frequency sine wave. Finally the signal waveform synthesis module synthesizes designated waveform with processed sine waves.
Keywords waveform synthesis,frequency separating and filtering, phase shifting filter display
1 引言
。函数信号发生器作为一种常用的信号源,能提供诸如正弦波、方波、三角波等常用波形。然而,当要求有别于上述波形时,上述设备则不再能提供人们所需的波形[1]。为满足对任意波形信号的要求,我们开发了