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我校研究生按照传统线路进行医用电子学弛张振荡器的实验时,得到的波形不仅失真,而且波形的种类也少。按其线路和实验步骤,学生对振荡器中主要元件的作用没有感性认识。为了弥补这些不足,我们运用较新元件设计了一个简单的线路,不仅减少了元器件,而且脉冲波形清楚,并能观察到几种波形。同时锯齿波形的频率,矩形脉冲波形的脉宽均可调。通过实验,学生们对各元件的作用加深了了解。这种简单的波形发生器,在教学、科研和医疗中,对需要观察和应用这种波形的有关实验有参考价值,现介绍如下:
When our graduate students perform the experiment of medical electronics relaxation oscillator according to the traditional circuit, the obtained waveform is not only distorted, but also has a few types of waveforms. According to their circuit and experimental procedures, students have no perceptual understanding of the role of the major components in the oscillator. To compensate for these shortcomings, we designed a simple circuit using newer components that not only reduced components, but also a clear pulse waveform and several waveforms. At the same time sawtooth waveform frequency, rectangular pulse waveform pulse width can be adjusted. Through experiments, students deepen their understanding of the role of each component. This simple waveform generator, in teaching, research and medical treatment, the need for observation and application of this waveform related experiments have reference value, are as follows: