回转器在振荡电路中的应用

本文叙述应用回转器的振荡电路的原理与实践.将运算放大器及其外接元件组成回转器,就能够模拟一只Q值极高的大电感,从而实现超低频振荡.这种等放电感的电感量可达1MH,甚至更高!如果将模拟电感与适当的电容组成并联谐振回路,它的振荡频率很容易低于1Hz.在此回路两端接上正反馈回路,就能维持稳定振荡,而且波形良好.电路输出可以作为标准信号,用来校准医用微分器,作生理电脉冲波形变换的研究.

The Application of a Gyrator to Oscillation Circuits

The principle and the practice of an oscillation circuit using a gyrator are discussed.Using operational amplifiers with their external components to form a gyrator,it is possible to simulate a large value inductor with a very high Q factor and to realize ultra-low frequency oscillation.Such an equivalent inductor has a value up to 1MH or even more!If a simulative inductor is paralleled with a suitable capacitor to constitute a parallel resonant circuit,the freqcency of the circuit becomes below 1Hz easily,when a positive feedback circuit is connected to the two ends of the parallel circuit,a stable oscillation can be maintained with perfect wave form.The output of the oscillator can be used as a standard signal for calibration of the differentiator to employ in research on the transformation of physiological pulse wave forms in medical science.