Electronic Circuits Lab 6

Introduction:

Write one to two paragraphs about the Lab. Explain the following information for this lab:

· What are the goals to achieve in the lab?

· What are the expectations of the lab?

· How will you be implementing this lab?

· What will you try to measure?

Equipment/Components:

List the type of equipment or components that you will be using? Where will you find these components? How will you use these components in Multisim/VHDL? Explain any adjustments required such as tolerances.

Procedure:

Briefly describe how you will approach the problem and try to solve the lab, describe and explain any techniques/rules/laws/principles you would use. Outline each step of the process.

Circuit design:

Take a screenshot of the circuit/logic from Multisim/VHDL as asked in the lab assignment before you run the circuit and paste it here in your report.

Execution/Results:

Run the circuit in Multisim/VHDL and copy/paste the results from the simulation including any readings, plots or graphs.

Copy/Paste the screenshots for all the measurements required in the lab here. Be sure to add a title and explain what each of the screenshots represent.

Analysis:

Analyze the results obtained from Multisim/VHDL and compare those to your calculated results (if required).

Answer the following questions:

· What did you discover/confirm?

· Use tables and diagrams to record results.

· Compare calculations with the measured values.

· Analyze your results.

Explain if your simulation is correct or incorrect and why. If the results are confirmed, then your measurements are correct. If they are not confirmed, explain what the problem is. You will need to discuss how to troubleshoot the circuit to achieve the correct results.

Conclusion:

Summarize the entire lab in 1 to 2 paragraphs with the results and analysis in mind.

Answer any questions asked in the lab assignment here.

Cite any sources that you may use in your report.

Week 4 Lab - Frequency Effects

Electronics II and Lab

Frequency Effects

INTRODUCTION

What are Bode plots? Use a well labelled diagram to aid your explanation.

Calculate the input-coupling circuit and output-coupling circuit low-frequency cutoff points for the circuit shown below.

EQUIPMENT

· <List all devices and meters used>

PROCEDURE

Using Multisim construct the circuits shown below:

a. Connect the Bode Plotter as shown, and use the setting in the figure. Set the function generator amplitude to 5mVp and 10Hz.

b. Attach the Tektronix oscilloscope channel 1 to measure peak-to-peak voltage across the function generator, and channel 2 to measure the peak-to-peak voltage across the load RL. Record both values in the results section, and use them to calculate the voltage gain in decibel – show ALL work.

c. How does the calculated voltage gain compare to the midband gain from the Bode plot?

d. Using bode plotter cursor to mark and measure the low and high cutoff frequency, calculate the bandwidth.

RESULTS

Show all screen shots – that prove all meter readings.

Record measured values and calculations in this section.

What types of applications can this circuit be used in? Explain.

CONCLUSION

What did you learn?

Week 5 Lab - Differential Amplifiers

Electronics II and Lab

Differential Amplifiers

INTRODUCTION

Discuss at least three very important characteristics of differential amplifiers.

What do the terms inverting and non-inverting mean in the context of amplifiers?

Calculate the ideal IT, IE, Vc for the differential amplifier shown in the diagram. Repeat the calculations using the second approximation. Show all work and record the final answers in the table.

EQUIPMENT

· <List of devices and meters that are used.>

PROCEDURE

Build the circuit in Multisim and measure IT, IE, Vc , record them in the table.

<Steps you took to carry out the lab.>

RESULTS

	IT	IE	VC
Ideal
2nd approx.
Measured

Compare calculations with the measured values.

What did you discover/confirm?

Include screen shots of the meter readings.

The table below shows readings for three different cases where the circuit above, was malfunctioning. Find the fault, assuming only one device in each case has a problem. List the steps taken to arrive at a solution.

	IC	IE	VC	What is the problem?
Case 1 Q1 Q2	4.87mA 4.61mA	4.89mA 4.64mA	15V 10.4V
Case 2 Q1 Q2	7.49mA 0	7.53mA 1.99mA	7.51V -695mV
Case 3 Q1 Q2	15pA 9.46mA	0 9.52mA	15V 5.54V

CONCLUSION

What did you learn?

Week 6 Lab - Op-Amp Circuits

Electronics II and Lab

Op-Amp Circuits

Design an Inverting Summing Amplifier with three channels using a 741Op-Amp. The voltage gain should be as follows (-1.3 for channel 1, -2 forchannel 2, and -4.7 for channel 3). Show the results for vout for all possible combinations of the channels in a table. Use screen shots to show vout meter readings.

INTRODUCTION

State the theory behind the lab.

Perform the calculations for the design.

EQUIPMENT

List of devices and meters used to conduct the experiment

PROCEDURE

Steps you took to carry out the lab.

RESULTS

What did you discover/confirm?

Screen shots of the meter readings.

Use tables and diagrams to record results.

Compare calculations with the measured values.

CONCLUSION

What did you learn?

Week 7 Lab - Oscillators

Electronics II and Lab

Oscillators

Design a 555 astable multivibrator using 2 resistors – Ra and Rb and a capacitor C, as shown in the circuit shown below. The specifications are: C = 680pF, one of the resistors is 10kΩ, and a duty cycle of 65%. Calculate all the values in the table, show ALL work.

INTRODUCTION

State the theory behind the lab

Answer the pre-lab question(s), and perform calculations if necessary.

EQUIPMENT

List of devices and meters used to conduct the experiment

PROCEDURE

Steps you took to carry out the lab.

RESULTS

What did you discover/confirm?

Screen shots of the meter readings.

Use tables and diagrams to record results.

Compare calculations with the measured values.

	Calculate/Given	Measure
Ra
Rb
tH
tL
period
frequency

CONCLUSION

What did you learn?

Week 8 Lab - Regulated Power Supplies

Electronics II and Lab

Regulated Power Supplies

INTRODUCTION

Describe how the shunt regulator, shown below, works.

Assuming VZ = 5.73V, calculate the Vout, IS, IL, IC .

EQUIPMENT

· List all devices and meters

· 1 potentiometer 50Ω

PROCEDURE

Using Multisim construct the circuit.

Replace the load resistance with the 50Ω potentiometer.

Vary it from 0Ω to 50Ω. For each setting of RL, measure Vout and record it in the table.

RESULTS

	Set RL	Measure Vout
1	0Ω
2	10Ω
3	20Ω
4	30Ω
5	40Ω
6	50Ω

Discuss the results.

What are some application functions for this type of circuit?

CONCLUSION

What did you learn?