5-12: Phasors: Passive RL Circuit Response

Phasors: Passive RL Circuit Response

In this lab, we measured the gain and phase responses of a passive RL circuit and with these experimental values to compare with theoretical values mathematically.

Pre-Lab: We did a pre-lab analysis to predict the amplitude gain and phase difference with 3 different frequency: Wc, Wc/10, and 10Wc (Wc = 2.2*10^5 Hz). When W= Wc, expected amplitude gain = 0.032

and expected phase difference = -45degree. When frequency = Wc/10 expected amplitude gain = 0.045

and expected phase difference = -5.7 degree. When frequency = 10Wc expected amplitude gain =24.5*10^-3 and expected phase difference = -84 degree

When W= Wc these were our results:

When W= Wc/10 these were our results:

When W= 10Wc these were our results:

The circuit as illustrated previously in the schematic

The data for exp value. The amplitude gain is different, becaese we used  I/V to calculate the  amplitude gain in pre-lab, and we use the Vout/Vin in the final calculation. 

Summary:In this lab,  we went over how to solve sinusoidal circuits, did a lab to see the gain and phase change in a RL circuit, and learned to solve for Thevenian and Norton equivalent of AC circuit.