Aiming at the school teaching experiment and amateur production test, using operational amplifier LM324 as core devjce to design a simple Low-frequency signal generator, which can generate common waveform. The circuit parameters are determined through calculation and analysis, the circuit is simulated based on Proteus, and the 20Hz - 20KHz waveform are obtained through experiment and test. The signal generator eireuit is simple, economic and practical. The frequency and amplitude of signal is adjustable, its waveform is stability and distortion degree is smaller.%针对学校教学实验和业余制作测试等需要,以运算放大器LM324为核心器件,设计了一个能产生常用波形的简易低频信号发生器.经过计算分析确定了电路的相关参数,在Proteus中进行了仿真,并通过实验测试获得了20 Hz～20 kHz的所需波形.该信号发生器结构简单、经济实用,信号的频率与幅度均可以调节,波形稳定、失真度小.
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