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ecel303_lab6se

# ecel303_lab6se - Drexel University Electrical and Computer...

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Drexel University Electrical and Computer Engineering Dept. Electrical Engineering Laboratory III, ECEL-303 TITLE: Sine Wave Generator NAME: Seher Ahmad PARTNERS: Palak Chandra TA: Nicholas Vacirca DATE PERFORMED: 11 th May, 2007 DATE DUE: 18 th May, 2007

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SINE WAVE GENERATOR OBJECTIVE:- The aim of this experiment was to learn the fundamentals of electronic sine wave generation. The experiment also required us to study oscillation, feedback circuits and practical electronic oscillators. CIRCUIT DIAGRAMS:- R 1 = 10 kΩ, R F = 10 kΩ (theoretical) Figure 1 Inverting Op-amp Circuit Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 R = 10 kΩ, R4 = 10 kΩ, C = 5.5nF (theoretical) Figure 2 The Wein Bridge Feedback Oscillator Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007
DATA SHEET:- Part Measured Value Resistor, R1 9.787 kΩ Resistor, R2 9.859 kΩ Resistor, R3 9.819 kΩ Capacitor, C1 5.603 nF Capacitor, C2 5.619 nF Table 1. Actual measured values of resistors and capacitors Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 Supply Voltage in Volts Output Voltage (Vpp) in Volts Frequency In kHz 5 .3125 - 10 7.188 2.915 15 12.03 2.933 20 16.72 2.920 25 21.41 2.903 30 26.09 2.890 Table 2. Measured values of output voltage (peak to peak) and frequency with the supply voltage varying from 30V to 5V in 5V steps (Part 4) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007

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Load Resistance, R L Output Voltage (Vpp) In Volts Frequency In kHz No resistance 21.56 2.899 100 kΩ 21.41 2.903 10 kΩ 20.00 2.915 1 kΩ 3.125 2.950 100 Ω 3.688 3.012 Table 3. Measured values of output voltage (peak to peak) and frequency with the load resistance varying from 100 kΩ to 100 Ω (Part 6) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 GRAPHS & PLOTS:- Part 1   Time (µs) V in V out
Fig. 3. Waveforms from the oscilloscope for the testing of the op-amp with input frequency of 1.002 kHz (Part 1) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 Time (µs) Fig. 4. Waveforms from the oscilloscope for the testing of the op-amp with output frequency of 998 Hz (Part 1) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 Part 2 V in V out

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Time (µs) V p-p = 21.25 V, Freq. =2.911 kHz, R 3 = 19.107 kΩ Figure 3. Waveform of the sine wave output obtained by varying the pot 3 (Part 2) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 Part 3 Time (µs) V p-p = 21.88 V, Freq.= 2.882 kHz, R 3 = 23.876 kΩ
Figure 4. Waveform of the sine wave output obtained by increasing the pot 3 (Part 3) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 Time (µs) V p-p = 8.906 V, Freq. =2.933 kHz, R 3 = 18.010 kΩ Figure 5. Waveform of the sine wave output obtained by decreasing the pot 3 (Part 3) Obtained by Seher Ahmad and Palak Chandra on May 11 th , 2007 Part 4

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ecel303_lab6se - Drexel University Electrical and Computer...

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