摘要
提出一种应用数字方法获得阻尼振荡波形的实验方案.采用一个D/A转换器的输出作为另一个D/A转换器的基准电压,实现了正弦波和指数波形在硬件上的相乘.采用此方法生成的阻尼振荡波形基波频率f与衰减时间常数τ之间完全独立可调.
The experimental method of damped oscillation generation by digital circuit is put forward. The method adopts two D/A converters, using the output one D/A converter as the reference voltage of another D/A converter, to implement the hardware multiplication of a sinusoidal function with a e exponential function. The fundamental frequency f and the decay-time constant τ of the damped oscillation waveform can be adjusted separately.
出处
《物理实验》
2008年第8期38-40,共3页
Physics Experimentation
关键词
阻尼振荡波形
D/A转换器
二阶相似系统
数字电路
模拟电路
damped oscillation waveform
D/A converter
second-order similar system
digital circuit
analog circuit
