ET222 Week5-8

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?

MIDTERM Week 4 Midterm

WEEK 5

Assignment

Differential Amplifiers

Week 5: Work Problems 15-2, 15-6, 15-10, 15-14, pg. 661-662.

Scan all work and save it for upload with the title: “HW5_StudentID”, with your student

id substituted in the file name. Show all work for full credit.

Upload file “HW5_StudentID” here.

LAB

Differential Amplifiers

INTRODUCTION

Discuss at least three very important characteristic 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

Assignment

Electronics II and Lab

Op-Amp Circuits

Week 6: Work Problems 16-2, 16-6, pg. 705.

Work Problems 17-2, 17-6, 17-10, 17-18, pg. 734-735.

Work Problems 18-2, 18-6, 18-10, 18-14, pg. 782.

Scan all work and save it for upload with the title: “HW6_StudentID”, with your student

id substituted in the file name. Show all work for full credit.

Upload file “HW6_StudentID” here

LAB

Op-Amp Circuits

Design a summing amplifier with three channels, using a 741C Op-Amp. The voltage

gain of the should be 1.3, 2, and 4.7 for channel 1 to channel 3. Show the results

forvout 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

Assignment

Oscillators

Week 7: Work Problems 21-2, 21-6, 21-10, 21-14 pg. 953-955.

Scan all work and save it for upload with the title: “HW7_StudentID”, with your student

id substituted in the file name. Show all work for full credit.

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

Assignment

Regulated Power Supplies

Week 8: Work Problems 22-2, 22-6, 22-10, 22-14, pg. 1005.

Scan all work and save it for upload with the title: “HW8_StudentID”, with your student

id substituted in the file name. Show all work for full credit.

Upload file “HW8_StudentID” here.

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?

Final Exam

This exam covers Modules 5-8. Scan, handwrite answers and upload

solutions. Show all required calculations and include any required screenshots from

MultiSIM for full credit.