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Experiment1

# Experiment1 - Mariel Losso 0577 EE 3221-4 Lab 12...

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Mariel Losso 0577 EE 3221-4 Lab 12: Introduction to PSPICE and AC Voltage Dividers September 8th, 2005 Lab Partner: Drew Barbier

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OBJECTIVE: To gain familiarity with PSPICE and to review in greater detail the ac voltage dividers studied in Experiment 4 PROCEDURE (Part 1): 1. Assemble Circuit in Figure 1. Figure 1 Based on the actual parts available in the lab, the circuit had to be designed ahead of time to accommodate what parts were actually available. Calculating for the resistance and capacitance values that would have the same impedance at a frequency between 4 kHz and 5 kHz: Choosing the resistor as the limiting factor, 330 Ω: kHz F RC 8 . 4 ) 1 )(. 330 ( 2 1 2 1 = = μ π 4 kHz < 4.8 kHz < 5 kHz, there for our chosen values are valid. 2. Apply 5 Vp-p sine wave at frequencies of 2 kHz, 4 kHz, 6 kHz, 8 kHz, and 10 kHz DATA AND RESULTS: Frequency (kHz) Vin (V) Vout (V) Phase Shift (μs) Phase Angles 2 5 4.32 31 22.32 4 5 3.41 28.35 40.824 6 4.6 2.82 20.9 43.2 8 4.47 2.26 18.2 52.416 10 4.45 1.99 15.7 56.52
This graph displays the output voltage as a function of the frequency. Output Voltage vs. Frequency 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 2 4 6 8 10 12 Frequency (kHz) Output Voltage (Volts) Series1 This graph displays the phase shift as a function of frequency Phase Angle vs. Frequency 0 10 20 30 40 50 60 0 2 4 6 8 10 12 Frequency (kHz) Phase Angle (Radians) Series1 QUESTIONS:

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Why does the digital meter not read ten volts? Because it gives you RMS values and all you get is the RMS value of half a cycle What is the output voltage at the frequency where the resistor and the capacitor have the same impedance?
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Experiment1 - Mariel Losso 0577 EE 3221-4 Lab 12...

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