基于555定时器的多波形信号发生器设计与实现

Design and Implementation of Multi-waveform Signal Generator Based on the 555 Timer

函数信号如正弦波、方波、三角波等在电子电工实验中经常作为信号源输入。函数信号可由多种不同的电路设计产生,如用集成运算放大器组成的RC桥式振荡电路,也可由集成芯片8038组成的信号发生器。提出用555定时器设计一种多波形信号发生电路,该电路输出波形的频率约为1kHz,幅度在0~0.2V之间可调。

Functional signals such as sine wave, square wave and triangular wave are often input as signal sources in electrical experiments. Function signals can also be generated by a variety of different circuit designs, such as a RC bridge oscillation circuit consisting of an integrated operational amplifier, or a signal generator consisting of an integrated chip 8038. In this paper, a multi-waveform signal generation circuit with the 555 timer is designed. The frequency of the output waveform is about 1kHz, and the amplitude is adjustable between 0 and 0.2V.