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EE 210 Laboratory 07 Worksheet
Experiment 1: Observing the VI Characteristics of a Capacitor
Data
Frequency (Hz) I (^) rms (measured) V (^) pp (measured) V (^) rms(calculated)^ Impedance (measured)Magnitude^ ImpedanceMagnitude (expected) 100 500 1, 2, 5, 10, 20,
Experiment 1 Step 5
Q1. Comparing your measured impedance values with the expected values, what can you
say about the assumed capacitor value?
Q2. In your measurements, you should notice that the voltage across the capacitor starts
decreasing significantly when the frequency gets very large. Based on your knowledge of
voltage division, impedance, and source resistances, explain why you think this is happening.
Hint: prelab question #3 may help as well.
Name: _________________________________ Section: __________
Experiment 2: Measuring the Frequency Response of a simple RC circuit
Data
Frequency (Hz) V (^) in (measured) V (^) out (measured) Gain (calculated) 20 50 100 200 300 400 500 600 800 1000 2000 3000 5000 10000 20000
Experiment 2 Step 7
Experiment 3: Baxandall Tone-control Circuit
Data
Baxandall gain measurements with both pots centered
Frequency (Hz) V (^) in (measured) V (^) out (measured) Gain (calculated) 20 800 20,
Q7. What do you observe about the gain as a function of frequency?
Baxandall gain measurements with Rp1 rotated all the way clockwise
Frequency (Hz) V (^) in (measured) V (^) out (measured) Gain (calculated) 20 800 20,
Q8. What do you observe about the gain as a function of frequency now? At which frequency
does the circuit start or stop having an effect on the gain?
Baxandall gain measurements with Rp1 rotated all the way counter-clockwise
Frequency (Hz) V (^) in (measured) V (^) out (measured) Gain (calculated) 20 800 20,
Q9: What do you observe about the gain as a function of frequency now? At which
frequency does the circuit start or stop having an effect on the gain?
Baxandall gain measurements with Rp2 rotated all the way clockwise
Frequency (Hz) V (^) in (measured) V (^) out (measured) Gain (calculated) 20 800 20,
Q10: What do you observe about the gain as a function of frequency now? At which
frequency does the circuit start or stop having an effect on the gain?
Baxandall gain measurements with Rp2 rotated all the way counter-clockwise
Frequency (Hz) V (^) in (measured) V (^) out (measured) Gain (calculated) 20 800 20,
Q14. Based on your measurements and observations, give a summary of what the
Baxandall tone-control circuit does. Make sure to specifically address the roles of Rp1 and
Rp2.
