低频信号发生器原理_设计低频信号发生器_低频信号发生器的设计

简易低频信号发生器的设计

雷

（陕西理工学院电信工程系通信073班，陕西 汉中 723003）

指导教师：陈正涛

[摘要] 本系统是基于AT89C52单片机的数字式简易低频信号发生器。用程序实现方波、锯齿波、三角波等信号，并在Protues电子设计平台上对方案进行了仿真。消除了传统信号发生器存在元器件分散性造成波形失真的弊端。系统采用AT89C52 单片机作为控制核心，采用数字/模拟转换电路（DAC0832）、按键电路。通过按键控制可产生方波、锯齿波、正弦波。波形的频率和幅度在一定范围内可任意改变，其设计简单、性能优良，可用于多种需要低频信号源的场所，具有一定的实用性。

[关 键 词] 单片机；信号发生器；D/A转换

[中图分类号] TN702 [文献标志码] A

Simple low frequency signal generator design

Lei Qiong

(Grade04,Class3,Major of Communication Engineering，Dept. of E.I.of Shaanxi University of

Technology, Hanzhong 723003,China)

Tutor:Chen Zhengtao

[Abstract] This system is based on AT89C52 single chip computer digital low frequency signal generator. Use program realization square-wave, sawtooth wave, waves signals, and in Protues electronic design platform for scheme is simulated. Eliminate the traditional signal generator existing components dispersion caused waveform distortion the drawbacks. System adopts AT89C52 single chip computer as control core and peripheral adopting digital/simulation transform circuit (DAC0832), key circuits. Through the button control can produce square-wave, sawtooth wave, sine wave. Waveform of frequency and amplitude within the scope of certain and arbitrarily change, its design can be , excellent performance and can be used in a variety of low frequency signal source place, need has practical value

[Key words] SCM；Signal generator；D/A convert

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