Transient Response of First-Order RL and Second-Order RLC Circuits | EE 271, Assignments of Microelectronic Circuits

Download Transient Response of First-Order RL and Second-Order RLC Circuits | EE 271 and more Assignments Microelectronic Circuits in PDF only on Docsity! - p. 1 of 5 - UNIVERSITY ☺F P☺RTLAND Sch☺☺l ☺f Engineering EE271 Electrical Circuits Laboratory Spring 2004 Dr. Aziz S. Inan and Dr. Joseph P. Hoffbeck Lab Experiment #7: Transient Response of First-Order RL and Second-Order RLC Circuits - p. 2 of 5 - Transient Response of First-Order RL and Second-Order RLC Circuits I. Objective In this experiment, the students will make measurements and observations on the transient step response of simple RL and RLC circuits. II. Procedure PART 1: Step Excitation of First-Order RL Circuits Pre-lab Assignment 1: A first-order inductive circuit is excited by a periodic pulse train as shown in Fig. 1. The values of the elements are given by R1=1 kΩ and Lcoil=15 mH respectively. Assuming the inductor to be ideal, calculate the time constant τ of this circuit. Approximately how long does it take for the inductor of this circuit to fully charge or discharge under pulse excitations? (Fully charge or discharge means the time it takes for the inductor current to reach approximately 99% of its final value.) Fig. 1. First-order RL circuit connected like a Low-Pass Filter (LPF). VR1 2.5 V 2.5 V VS Scope Channel2 Output Signal Scope Channel1 Input Signal R1=1 kΩ LPF Lcoil=15 mH Practical inductor coil Ideal inductor coil Rcoil=? Lideal=15 mH Low-frequency equivalent circuit for a practical inductor coil