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学生在学习正弦波自激振荡器时,对自激振荡器的起振过程,总是感到不好理解,甚至持怀疑态度。这是由于起振过程较复杂,又非讲课重点,讲课学时又少,因而课堂上就不能作深入讲解。另外,目前正弦波振荡器实验内容及观察到的波形都是稳态过程。这两方面的原因都使学生对起振过程认识不深。为了弥补这个不足,我们在做 RC 正弦波振荡器实验
Students learning sine wave self-excited oscillator, the self-excited oscillator start-up process, always feel bad to understand, and even skeptical. This is due to the complicated process of starting-up, not the focus of lectures and the lack of time for lectures. Therefore, it can not be explained in depth in the classroom. In addition, the current experimental content of the sine wave oscillator and observed waveforms are steady-state process. The reason of these two respects is to make the student do not know deep about starting the course of vibration. In order to make up for this deficiency, we are doing RC sine wave oscillator experiment