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四路多频信号的单片机实现
引用本文:张金毅. 四路多频信号的单片机实现[J]. 吉林大学学报(信息科学版), 1994, 0(2)
作者姓名:张金毅
作者单位:长春邮电学院电信工程系
摘    要:提出了一个由单片微型计算机8098产生四路多频信号的方案,说明了其实现的基本原理和控制形式,给出了接口电路和软件程序。其实现方法是对多频信号进行预先取样存贮,再利用8098微处理器的高速输出(HSO)功能,将存贮波形以脉宽调制的方式输出,然后进行有源滤波,恢复模拟多频信号,从而用一个单片机实现了相互独立的四路多频信号发生器,经实际调试和运行证明,此方案完全可靠,并得出满意的结果。

关 键 词:微处理机,双音多频,脉宽调制,多频发生器

Single chip computer 4-channel multifrequency signals
Zhang Jinyi. Single chip computer 4-channel multifrequency signals[J]. Journal of Jilin University:Information Sci Ed, 1994, 0(2)
Authors:Zhang Jinyi
Abstract:A practical realization of 4-Channel multifrequency generator using micropro-cessor 8098 is presented in this paper. The principles of realization and con-trol method are provided and the interface circuits and software programs are also given. Dual tone multifrequency signals are pre-sampled and stored in the memory. By taking advantage of the high speed output(HSO)ability of the 8098,the output of the processor is in the form of pulse width modulation(PWM).The analogne signals are recovered by using the active filters,In short,by utilizing a microprocessor,mutual-independent 4-channel muItifre-quency generator is implemented.The interface circuits and software pro-grams given here are well tested in practice.The results are satisfactory and the techniques used are feasible.
Keywords:microprocessors  dual tone multifrequency  pulse width modula-tion  multiltifrequency generator  
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