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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. -1- 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 -2- 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 -3- 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 -4- 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. -5- 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. -6- 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. -7- 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. -8- 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 - END -9-