Attachment # 00002613 - ECET220_W3_Lab_Instructions.docx
ECET220_W3_Lab_Instructions.docx (2752.44 KB)
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Week 3 Lab InstructionsBipolar Junction Transistor Amplifier Circuit AnalysisI. Objectives:To analyze bipolar junction transistor (BJT) common emitter (CE) amplifiers using the amplifier parameters.To determine the BJT voltage-divider biased DC parameters based on schematic diagrams, simulated circuits, and constructed circuits.To verify the operations of CE amplifier based on the theatrical framework (laws and theorems).To determine the phase angle between input and output signals.II. Equipment and Parts ListEquipment:Personal computer (PC) or compatibleFunction generator DMM (digital multimeter)Variable DC power supplyOscilloscopeParts:Qty.Parts and Components Tolerance BandWattage Rating, W12N3904 Transistor1470 Ω Resistorgold¼12 KΩ Resistorgold¼110 KΩ Resistorgold¼147 KΩ Resistorgold¼11.0 uF Capacitor110 uF Capacitor1Proto BoardHookup wires of different colors3BNC to split ends cableSoftware: MultiSimIII. ProcedureTheoretical AnalysisGiven the schematic diagram shown in Figure 1, calculate the BJT voltage-divider biased DC parameters (VB, VC, VE, VCE, VBE, VCEQ, IB, Ic, IE, and ICQ) with assumption hFE = 50. Enter the calculated values in Table 1 on the worksheet.Note: VB, VC, VE are referred to point voltages, and they are quantified with respect the circuit reference (i.e., ground); while, VCE, VBE, are known as voltage drop across two points.Figure 1 Voltage-Divider Biased Common Emitter (CE) Amplifier Schematic DiagramCalculated ParametersVoltage (V)Current (mA)Base Voltage (VB)-Collector Voltage (VC)-Emitter Voltage (VE)-Collector-Emitter Voltage (VCE)-Base-Emitter Voltage (VBE)-Collector-Emitter Voltage @ Cutoff (VCE(off))-Collector-Emitter Voltage (VCEQ)-Base current (IB)-Collector current (Ic)-Emitter current (IE)-Collector current @ Saturation (Ic(STA))-Collector current (ICQ)-Table 1MultiSim SimulationDesign the circuit shown in Figure 2 using MultiSIM. Set the DC voltage source to 9V for VCC.Measure the BJT voltage-divider biased DC parameters (VB, VC, VE, VCE, VBE, IB, Ic, and IE).Calculate (VCEQ and ICQ) based on the measured values and hFE = 50. Enter the measured and calculated values in Table 2 on the worksheet.Figure 2 Voltage-Divider Biased Common Emitter (CE) Amplifier MultiSim DesignSimulated and Calculated ParametersVoltage (V)Current (mA)Base Voltage (VB)-Collector Voltage (VC)-Emitter Voltage (VE)-Collector-Emitter Voltage (VCE)-Base-Emitter Voltage (VBE)-Collector-Emitter Voltage @ Cutoff (VCE(off))-Collector-Emitter Voltage (VCEQ)-Base current (IB)-Collector current (Ic)-Emitter current (IE)-Collector current @ Saturation (Ic(STA))-Collector current (ICQ)-Table 2Connect the input (Vin) and output (Vout) of the amplifier to two separate channels of an oscilloscope.Connect the input (Vin) of the amplifier to a function generator and set the parameters of the functions generator to: (a) sine-wave mode at 1 kHz, and (b) amplitude of signal to 0.5 V peak-to peak (VPP). If the output signal (Vout) is clipped, reduce the input signal amplitude until the clipping no longer exists. A typical scope display is shown in Figure 3.Figure 3 captured input and output signal waveforms of the simulated circuit on the oscilloscopeCapture the input and output signal waveforms and insert them on the worksheet with proper caption. Then, answer the following questions on the worksheet.What is the VPP of the input signal Vin?__________________VWhat is the VPP of the output signal Vout?________________VWhat is the phase angle between the input and output signals?_________DegreesCalculate the voltage gain (AV) of this amplifier? _________________Reduce the amplitude of the input signal to one-half the amount used in Step 3.Capture the input and output signal waveforms and insert them on the worksheet with proper caption. Then, answer the following questions on the worksheet.What is the VPP of the input signal Vin?__________________VWhat is the VPP of the output signal Vout?________________VWhat is the phase angle between the input and output signals?_________DegreesCalculate the voltage gain (AV) of this amplifier? _________________Breadboard ConstructionConstruct the circuit in Figure 1 on a breadboard.Set the DC voltage source to 9V for VCC. Measure the BJT voltage-divider biased DC parameters (VB, VC, VE, VCE, VBE, IB, Ic, and IE). A typical collector (VC) voltage measurement is shown in figure 4.Calculate (VCEQ and ICQ) based on the measured values and hFE = 50. Enter the measured and calculated values in Table 3 on the worksheet.Figure 4 Voltage-Divider Biased Common Emitter (CE) Amplifier constructed circuitMeasured and calculated ParametersVoltage (V)Current (mA)Base Voltage (VB)-Collector Voltage (VC)-Emitter Voltage (VE)-Collector-Emitter Voltage (VCE)-Base-Emitter Voltage (VBE)-Collector-Emitter Voltage @ Cutoff (VCE(off))-Collector-Emitter Voltage (VCEQ)-Base current (IB)-Collector current (Ic)-Emitter current (IE)-Collector current @ Saturation (Ic(STA))-Collector current (ICQ)-Table 3Connect the input (Vin) and output (Vout) of the amplifier to two separate channels of an oscilloscope. Connect the input (Vin) of the amplifier to a function generator and set the parameters of the functions generator to: (a) sine-wave mode at 1 kHz, and (b) amplitude of signal to 0.5 V peak-to peak (VPP). If the output signal (Vout) is clipped, reduce the input signal amplitude until the clipping no longer exists. A typical scope display is shown in Figure 5.Figure 5 captured input and output signal waveforms of the constructed circuit on the oscilloscope.Capture the input and output signal waveforms and insert them on the worksheet with proper caption. Then, answer the following questions on the worksheet.What is the VPP of the input signal Vin?__________________VWhat is the VPP of the output signal Vout?________________VWhat is the phase angle between the input and output signals?_________DegreesWhat is the voltage gain (AV) of this amplifier? _________________Reduce the amplitude of the input signal to one-half the amount used in Step 5.Capture the input and output signal waveforms and insert them on the worksheet with proper caption. Then, answer the following questions on the worksheet.What is the VPP of the input signal Vin?__________________VWhat is the VPP of the output signal Vout?________________VWhat is the phase angle between the input and output signals?_________DegreesWhat is the voltage gain (AV) of this amplifier? _________________IV. Results Analysis Compare the calculated, simulated, and measured parameter values, and enter your comments on the worksheet. Be sure to calculate the percentage of error in each method and to identify the source/s of error.Plot the DC load-line and identify the Q-point for the calculated, simulated, and measured methods. Explain the significance of shifting the Q-point on the DC line and which method will result in better Q-point.IV. TroubleshootingDescribe any problems encountered and how those problems were solved.V. QuestionsPlease provide the answer to the following questions on the worksheet.Did your theoretical calculations closely match the results obtained from the MultiSim simulation? (Yes/ No).Comments:Did your theoretical calculations closely match the results obtained from the constructed circuit? (Yes/ No).Comments:Did your results obtained from the Multisim simulation closely match the results obtained from the constructed circuit? (Yes/ No).Comments:VI. GradingDeliverable% of GradePoints AchievedStatistics (calculations, accurate values)15Diagrams (labels, accuracy)6Analysis (interpretation and discussion results)6Organization (format of results and style)3Total Points30
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  1. Tutorial # 00043232 Posted By: mac123 Posted on: 01/28/2015 10:37 AM
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    The solution of ECET220 iLab3...
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