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Unformatted text preview: ECE 2100 Homework 4 Professor Alyosha Molnar Due March 31, 2011 Subjects: Sinusoidal steady-state analysis, Phasors, frequency-domain analysis. 1) Prelab: Looking at the overlaid input/output sinewaves below, estimate: -2.5-2-1.5-1-0.5 0.5 1 1.5 2 2.5 0.2 0.4 0.6 0.8 1 1.2 time, microseconds Voltage Input Output a. The frequency in Hz. b. The frequency in radians per second. c. The change in amplitude between input and output (that is the ratio of output to input amplitudes) d. The change in phase between input and output (Remember that time delay corresponds to negative phase) e. Write the transformation from input to output as a phasor, and as a complex number in Cartesian form. That is, Vout = (A+jB)Vin. What are A and B? Prelab: For problems 2-5 , You will be analyzing the impedance and voltage- division characteristics of a several “black box” circuits in lab. Several example circuits are given below. In each case analyze the impedance across each pair of terminals (a complex number, as a function of ω ), and in particular analyze Z for f=0Hz. Also use voltage divider analysis to find the phase and amplitude of V...
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