lab 1

lab 1 - Steve Smith Summer 2003 Lab 1 Introduction to...

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Steve Smith Summer 2003 Lab 1 Introduction to Pspice and AC Voltage Dividers 6/9/2003 Lab Partner: Jaclyn Aucoin
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1) Connect the circuit in Fig 1, choosing values of the resistor and the capacitor so that the reactance of the capacitor 1/2fC is equal to the resistance at a frequency of 4 to 5 kHz. R=1/(2ΠfC) => f=1/(2ΠRC) 4.6kHz = 1/(2*Π*R*0.01μF) => R = 3459Ω, 3.3kΩ was chosen, recalculating f = 4.8kHz. Apply approx. a 10Vp-p sine wave from the function generator at frequencies of 2kHz, 4kHz, 6kHz, 8kHz, and 10kHz to the input. Measure the input voltages with the digital meter and the scope. You will observe that the digital meter does not read “10” volts. Why? The digital meter is calibrated to read RMS values of the signal applied. The frequency generator was set to output a sine wave of 9.59Vp-p as read with the o- scope. The RMS value for this signal will be (Vp-p/2)*√2, or (9.59/2)*.707=3.390 VAC. The digital meter read 3.387 VAC Readings from above. Frequency Vin (Vp-p) (o-scope) Vin (digital meter) Vout Vp-p (scope) Vout (digital meter) Delta t 2 kHz 10 3.39 8.79 3.07 31.4us 4kHz 10 3.38 7.40 2.50 27.2us 6kHz
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lab 1 - Steve Smith Summer 2003 Lab 1 Introduction to...

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