Devry ECET220 iLab week 2

Laboratory Report Cover/Worksheet
DeVry University
College of Engineering and Information Sciences

Course Number:ECET220

Professor:

Laboratory Number: 2

Laboratory Title:Analysis of BJT Amplifier Classes of Operation using Simulation and Actual Construction

Submittal Date:

Objectives:

1. To analyze a BJT Amplifier Classes Amplifier comprising of two capacitors (C) and resistors (R) and measure voltage drops and currents at different locations.

2. To theoretically calculate and verify the circuit using Ohm’s law and Kirchhoff’s law, which were learned in previous courses.

3. Determine the voltages (V_E, V_C, V_B) with respect to the circuit common. Measure and verify the same using the simulation.

4. Determine if the output voltage is in-phase or out-of-phase with its input waveform.

Results:

The theoretical calculations, simulation, and construct for the DC measurements were as expected. The AC portion were the same for the theoretical and simulation, however for the build they were not as expected. It is possible the voltage was not correct, so the results were skewed.

Conclusions:

The analysis of the BJT Amplifier confirmed the theoretical calculations and simulation to be very close to accurate. The construct confirmed the DC portion of the BJT Amplifier, and if the AC construct is accurate, the construct will confirm the AC portion of the BJT Amplifier.

Team:			ECET220
	Name		Program		Signature
	Name		Program		Signature
	Name		Program		Signature

Observations/Measurements:

III. A. 1. Theoretical analysis of the circuit:

Calculate Voltages Below	Voltages (V)
Voltage from emitter to common (VE) =
Voltage from collector to common (VC)
Voltage from base to common (VB)
Calculate: Voltage drop between collector and emitter (VCE)
Calculate: Voltage drop between base and emitter (VBE)
Voltage across the collector resistor (R2)
Calculate Current Below
Collector current

Table 1

III. B. 2. Multisim simulation and circuit measurements:

Calculate Voltages Below	Voltages (V)
Voltage from emitter to common (VE)
Voltage from collector to common (VC)
Voltage from base to common (VB)
Calculate: Voltage drop between collector and emitter (VCE)
Calculate: Voltage drop between base and emitter (VBE)
Voltage across the collector resistor (R2)
Calculate Current Below
Collector current

Table 2

III. B. 5. Paste input and output waveforms from oscilloscope below:

Input waveform:

Output waveform:

a. What is the peak to peak voltage of V_in from the Oscilloscope waveform?

Peak to peak voltage of Vin =

b. What is the peak to peak voltage of V_out from the Oscilloscope waveform?

Peak to peak voltage of Vout =

c. Are the V_in and V_out waveforms in phase or out of phase?

Are Vin and Vout waveforms in phase?

d. Calculate the voltage gain (A_V) of this circuit?

voltage gain (AV) =

III. B. 7. Paste input and output waveforms from oscilloscope below

Input waveform:

Output waveform:

a. What is the peak to peak voltage of V_in from the Oscilloscope waveform?

Peak to peak voltage of Vin =

b. What is the peak to peak voltage of V_out from the Oscilloscope waveform?

Peak to peak voltage of Vout =

III. C. 1. Place a digital photo of your circuit below:

III. C. 3. Hardware circuit and circuit measurements:

Calculate Voltages Below	Voltages (V)
Voltage from emitter to common (VE)
Voltage from collector to common (VC)
Voltage from base to common (VB)
Calculate: Voltage drop between collector and emitter (VCE)
Calculate: Voltage drop between base and emitter (VBE)
Voltage across the collector resistor (R2)
Calculate Current Below
Collector current

Table 3

III. C. 4. Paste input and output waveforms from oscilloscope below:

Input waveform:

Output waveform:

a. What is the peak to peak voltage of V_in from the Oscilloscope waveform?

Peak to peak voltage of Vin =

b. What is the peak to peak voltage of V_out from the Oscilloscope waveform?

Peak to peak voltage of Vout =

c. Are the V_in and V_out waveforms in phase or out of phase?

Are Vin and Vout waveforms in phase ?

d. Calculate the voltage gain (A_V) of this circuit?

voltage gain (AV) =

III. C. 6. Paste input and output waveforms from oscilloscope below:

a. What is the peak to peak voltage of V_in from the Oscilloscope waveform?

Peak to peak voltage of Vin =

b. What is the peak to peak voltage of V_out from the Oscilloscope waveform?

Peak to peak voltage of Vout =

IV. Summary – Please answer the following questions:

a) Did your theoretical calculations closely match the results obtained from the Multisim simulation? (Yes, No)

b) Did your theoretical calculations closely match the results obtained from the Proto Board circuit? (Yes, No)YES and No

c) Did your results obtained from the Multisim simulation closely match the results obtained from the Proto Board circuit? (Yes, No)YES