# Et 212 week 6 lab

## AC Models

Introduction:

Week 6 lab is based on the AC models of a transistors. After the transistor has been biased with a Q-point near the middle of the load line, we can couple a small AC voltage into the base. This creates an AC collector voltage which is larger than the base voltage and hence this arrangement results in an amplifier with a voltage gain.

Please review the following videos before getting started with this lab:

1. Watch the video: “Video 3: Fundamentals of breadboard
2. Watch the video: “Video 4: Basic electrical components
3. Watch the video: “Video 5: Simple resistive circuit with NI myDAQ

Materials and Equipment:

• Hardware Parts (In the Toolbox):
• An NPN transistor: 2N3904
• Five resistors: Two – 1kΩ, 2kΩ, 10kΩ and 40kΩ
• Three Capacitors: 1μF, 100μF
• Jumper wires

Equipment:

• Software equipment:
• Multisim
• Virtual Instruments (in Multisim)
• Agilent Multimeter
• Hardware Equipment:
• NI myDAQ Instrument device
• Screw Driver
• Screw Terminal connector
• USB Cable
• Multimeter with probes
• Function Generator, Oscilloscope, Multimeter from NI ELVISmx Intrument Launcher

Procedure:

*** This lab has to be implemented in hardware (using NI myDAQ) as well as Software (Multisim) ***

Part A:

1. Analyze the circuit or the amplifier shown in Figure 1. Determine the voltages VB, VE, VC, VBE and VCE. Using the beta value of 100, determine the gain of the amplifier (AV). (Include 20% tolerances for resistors and capacitors).
2. Construct the circuit shown in Figure 1 on the breadboard using the hardware parts.
3. Using the jumper wires, screw driver and screw terminal connector, connect the board to NI MyDAQ Instrument Device.
4. Using the function generator in NI ELVISmx Instrument Launcher, provide the voltage (Vin). Use channel AO0 pin on the NI myDAQ Instrument Device to provide this voltage. Make sure the frequency is 1 KHz frequency.
5. Using +15V pin out on the Instrument Device provide the supply voltage VCC.
6. Perform the DC Analysis by disconnecting the capacitors and measuring VB, VE, VC, IB, IE and IC.
7. Place the capacitors back and using pin AI0 on the NI myDAQ Instrument Device, measure the required voltages: VB, VE, VC VBE, VCE.
8. Measure the currents: IC and IE using the Multimeter.
9. Use AI1 on the NI myDAQ Instrument Device to measure the load voltage VRL. Record the measurements and compare them with the calculated values in step 1.
10. Using the input voltage Vin, base voltage VB and load voltage VRL, determine the gain of the amplifier (AV).

Figure 1

Part B:

1. Download the “Lab 6 troubleshooting” file and perform analysis for the circuits to locate the fault embedded in the circuit.
2. Step by step measure the key point’s value with Agilent multimeter. Carefully analyze each measured value to locate the fault within the circuits. Fix the fault and with the corrected fault in the newly circuit, measure and record the new values.

Review questions:

1. Compare a calculated and measured values. Discuss whether the values are the same of different. If they are different, provide the reasoning.
2. Does the DC analysis confirm your calculations?
3. What is the gain of the amplifier? Does the gain obtained from analysis match the measured gain? If not, what is the problem and how would you fix it?
4. What is the role of capacitors in the AC analysis?
5. Did you find any clipping of the collector current? If so, how did you adjust the circuit to avoid clipping?

Deliverables:

1. DC and AC analysis of the circuit and all the calculations including gain of the amplifier from step 1.
2. Place your student ID card on the breadboard and take a picture of the circuit board and pin out on the NI myDAQ Instrument Device.
3. Take screenshots of the measurements obtained from function generator and Oscilloscope and Multimeter on the NI ELVISmx Instrument Launcher on your screen.
4. Screenshots of the measurements from DC analysis (without the capacitors). Screenshots of the measurements from AC analysis (with the capacitors). Screenshots of the input voltage Vin, base voltage VB and load voltage VRL.
5. Screenshots of collector voltage (Vc) (if any clipping).
6. Tabulate the data from analysis and measurements to confirm the gain of the amplifier.
Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Australia Assessments
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Excellent as always!
Customer 454647, June 26th, 2020
I received a mastery on this assignment!
Customer 463143, August 31st, 2022
Psychology
Good work.
Customer 462579, June 4th, 2022
Other
The paper was beautifully written and the ppt slide exceeded my expectations. Thank you so much for assisting me with a last minute assignment.
Customer 452455, May 9th, 2023
Management
support is great. I am grateful to you and your company. thank you very much.
Customer 454227, April 6th, 2020
Computer science
Excellent.
Customer 462387, April 4th, 2022
Entertainment & Gaming
Commendable.
Customer 452441, April 4th, 2022
Humanities
On point.
Customer 463131, July 6th, 2022
Political science
Great Job Bless your heart and soul
Customer 453983, February 7th, 2020
Education
Very well put!!! thank you
Customer 463875, March 11th, 2023
English 101
Looks really good, thanks
Customer 454425, June 16th, 2020
Nursing
thks
Customer 453939, January 27th, 2020
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend