Download Select appropriate values for Variable Resistor R and Capacitor C

CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
CSC23 Electronic Circuits Lab Work 1
RLC Circuit Transient & Frequency
Responses
LAB 1 - Report Sheet
Name of students Student ID
Date
.
1.
Briefly summarized the step-by-step procedures for obtaining your experiement
results.
Note : Add extra pages if necessary.
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
PART B – Second Order RLC Circuit - Step Response Transient Analysis
Select appropriate values for Variable Resistor R and Capacitor C and using the primary windings
of the transformer as Inductor L.
Item
Variable Resistor R
Capacitor C
Function generator settings
Values
STEP SIGNAL OF
Adjust the Variable Resistor R to MINIMUM position. Observe the WAVEFORM OF capacitor
voltage Vc(t) by using OSCILLOSCOPE. Sketch the waveform of Vc(t) in Fig. 1.
Descriptions:
Time base Setting:
Channel 1 Y-Setting
Channel 2 Y-Setting
Fig. 1
Adjust the Variable Resistor R to HALF WAY BETWEEN MINIMUM AND MAXIMUM position.
Observe the WAVEFORM OF capacitor voltage Vc(t) by using OSCILLOSCOPE.
Sketch the waveform of Vc(t) in Fig. 2
Descriptions:
Time base Setting:
Channel 1 Y-Setting
Channel 2 Y-Setting
Fig. 2
Adjust the Variable Resistor R to MAXIMUM position. Observe the WAVEFORM OF capacitor
voltage Vc(t) by using OSCILLOSCOPE. Sketch the waveform of Vc(t) in Fig. 3
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
Descriptions:
Time base Setting:
Channel 1 Y-Setting
Channel 2 Y-Setting
Fig. 3
PART B – Impedance Series RLC Circuit
Select the WAVEFORM of the function generator to SINE-WAVE.
Item
Values
Frequency 1
Frequency 2
Frequency 3
Amplitude (pk-pk)
Observe the WAVEFORM OF Vin(t) and Vc(t) by using OSCILLOSCOPE.
Sketch the waveform of Vc(t) in Fig. 4a-c
Descriptions:
Time base Setting:
Channel 1 Y-Setting
Channel 2 Y-Setting
Fig. 4a
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
Descriptions:
Time base Setting:
Channel 1 Y-Setting
Channel 2 Y-Setting
Fig. 4b
Descriptions:
Time base Setting:
Channel 1 Y-Setting
Channel 2 Y-Setting
Fig. 4c
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
DATA ANALYSIS & CALCULATION
1.
Briefly describe the physical meaning of (i) underdamped (ii) critically damped (iii)
overdamped responses of RLC circuits. What are the meanings of forced response
and natural response.
Note : Add extra pages if necessary.
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
2. Based the circuit L and C parameters that you chosen in Part B, derive the
characteristics equation, find the range of R for (i) underdamped (ii) critically damped (iii)
overdamped. Refer to the practical results in part B, comments on any discrepancies
between practical results and theoretical results.
Note : Add extra pages if necessary.
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
3. Based the circuit L and C parameters that you chosen in Part B, select one value of R
for overdamped case, calculate the time response of capacitor voltage for a step input
of DC voltage of 1.0V.
DATA ANALYSIS & CALCULATION
Note : Add extra pages if necessary.
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
4. Based the circuit L and C parameters that you chosen in Part B, select one value of R
for (i) overdamped (ii) critically damped (iii) underdamped cases, SIMULATE the step
responses of capacitor voltage for a step input of DC voltage of 1.0V by using computer
software, describe step by step how you obtain the simulation results.
DATA ANALYSIS & CALCULATION
Note : Add extra pages if necessary.
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CSC23 Lab Work 1 –RLC Circuit Transient & Frequency Responses
CONCLUSION & DISCUSSION
Summarized what you have learnt from this lab work and the theoretical and practical
findings of the experiment
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