摘要
利用Mathematica软件,通过计算机声卡外接简洁合理的电路,将计算机强大的运算功能与直接数字式频率合成(DDS)技术的基本思想相结合,设计了一种超低频函数信号发生器。信号的频率、幅值和相位都可以通过键盘实现数控无级步进,频率稳定度与晶振在同一数量级,能写出数学表达式或给出数列值的信号都可以产生,是真正的函数信号发生器,无需切换波段,最大频率范围0.005Hz～10kHz,最大输出信号20Vpp,并能实现功率输出。
An ultra-low frequency signal generator is designed by using Mathematica software, PC sound card and a simple circuit, with the operation function of PC and DDS technology. The frequency, amplitude and phase of the signal are controlled by PC keyboard. Its frequency stability is the same with the one of the crystal oscillator. It can produce the various function signals. Its max frequency range is form 0.005Hz to 10 kHz, do not need switch the band, and maximum output is 20Vpp. It can also supply the output of power.
出处
《电测与仪表》
北大核心
2006年第4期58-60,64,共4页
Electrical Measurement & Instrumentation
