摘要
研制了能够直观演示多倍频简谐振动合成的仪器.利用单片机控制直接数字合成芯片,精确产生任意频率和相位的4路正弦信号,通过模拟加法电路实现信号的合成.通过与计算机仿真结果的比较,实验仪能够很好地演示多倍频简谐振动的合成.
An experimental instrument is developed to directly demonstrate multi-frequency harmonic vibrations synthesis. SCM is used to control the direct digital synthesis chips to produce four sinusoidal signals of arbitrary frequency and phase. The superposition of these signals is realized by using analog adder circuit. Compared with the computer simulation results, the experimental instrument can demonstrate the multi-frequency harmonic vibrations synthesis very well.
出处
《物理实验》
2008年第7期16-18,共3页
Physics Experimentation
基金
江苏省示范实验教学中心基金项目(No57315009)
关键词
多倍频率
简谐振动
直接数字合成
multi-frequency
harmonic vibration synthesis
direct digital synthesis
