基于电容倍增器的超低频正弦信号发生器的研究

为了改善超低频正弦信号发生器对电容大容量、无极性的要求，介绍了一种基于电容倍增原理的超低频正弦波振荡电路。利用电容倍增器的原理，选择电容接地的RC移相选频网络，设计一个三节相位滞后式RC正弦波振荡器。通过硬件电路实验和仿真分析，此电路能够实现以无极性、小容量等高性能参数电容获得频率很低、幅值大的正弦信号输出。此振荡电路调节方便，输出稳定，可满足实验教学对超低频信号源的要求。

Research on ultra-low frequency sinusoidal signal generator based on capacity multiplier

In order to improve the requirement of capacity in ultra-low frequency sine wave signal generator,a kind of ultra-low frequency oscillation circuit based on principle of capacity multiplier was introduced.An RC sine wave oscillation with three section phase position used capacity multiplier was designed.From hardware circuit experiment and simulation,the oscillation with the performance of output stability and easy adjustment obtains low output frequency and high amplitude.The oscillations satisfy the requi...