基 于 单 片 机 的 信 号 源 设 计Based on Single-chip Microcontroller 's Signal Sources Design基 于 单 片 机 的 信 号 源 设 计 [摘 要] 本系统是基于 AT89C51 单片机控制的信号源设计，可输出电压值为 0～5V，频率为 0～1000Hz 的方波、锯齿波、三角波和正弦波等四种波形信号。通过外围芯片实现数据的转换控制，利用数码管来实现对输出波形的信号参数进行实时显示。本系统输出的各种信号，均由软件产生各种数据，再经过 D/A0832 转换后输出波形信号。本设计输出的信号源，适用于多种低频信号源的使用场所。采纳这种方法设计的信号发生器具有成本廉价和显示效果好, 系统的抗干扰性强、设计灵活方便等优点，有着宽阔的市场前景。[ 关 键 字 ] 单 片 机 ； AT89C51; 信 号 源 ； D/A 转 换Based on Single-chip Microcontroller 's Signal Sources DesignElectronic Information Project Major YANG Xiao-panAbstract: This system is the supply signal sources design which controls based on AT89C51 single-chip microcontroller, but the output voltage value is 0~5V, the frequency is the 0~1000Hz square-wave, the saw-tooth wave, the triangular wave and the sine wave and so on four kind of profile signals. Realizes the data switching control through the periphery chip, realizes using the nixietube to the output wave shape signal parameter carries on the real time display. This system output's each kind of signal, has each kind of data by the software, again transforms after D/A0832 output wave shape signal. This design output's signal sources, is suitable for many kinds of low frequency signal sources use places. Uses this methods design the signal generating device to have the cost to be inexpensive and the demonstration effect is good, system's anti-jamming is strong, merits and so on design nimble convenience, have the broad market prospect.Key words: Single-chip microcontroller; AT89C51; Signal sources; D/A tr...
