What is the role of capacitors in the ac analysis

Assignment Help Electrical Engineering

Reference no: EM131393712

AC Models

Introduction:

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:

Breadboard
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 V_B, V_E, V_C, V_BE and V_CE. 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 V_B, V_E, V_C, I_B, I_E and I_C.

7. Place the capacitors back and using pin AI0 on the NI myDAQ Instrument Device, measure the required voltages: V_B, V_E, V_C V_BE, V_CE.

8. Measure the currents: IC and IE using the Multimeter.

9. Use AI1 on the NI myDAQ Instrument Device to measure the load voltage V_RL. Record the measurements and compare them with the calculated values in step 1.

10. Using the input voltage V_in, base voltage V_B and load voltage V_RL, determine the gain of the amplifier (AV).

Part B:

1. Download the "Lab 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.

Attachment:- Lab Assignment.rar

Reference no: EM131393712

Questions Cloud

Monopolist produce in order to maximize profits : A monopolist faces market demand given by P = 100 – 3Q. For this market, MR = 100 – 6Q and MC = 25. What quantity of output will the monopolist produce in order to maximize profits?

What features of disney films support or undermine cronon : Defend your claims by citing specific passages in Cronon and specific details from movies. Do you agree with Lutts that films like Bambi cultivate in us a problematic view of nature? If so, what is that view? If not, how can we harmonize those vi..

Design a personalized key holder for a recreation vehicle : Design a personalized key holder for a recreation vehicle that is used occasionally. When not in use, it must hang on a wall or key rack. The material is to be lightweight and colorful.

Create an ethics code for a hypothetical government entity : Your assignment is to create an ethics code for a hypothetical government entity or agency. Please describe the agency you propose, then create an ethics code for your agency. You can find helpful suggestions at the Institute for Local Government...

What is the role of capacitors in the ac analysis : Compare a calculated and measured values. Discuss whether the values are the same of different. If they are different, provide the reasoning. What is the role of capacitors in the AC analysis

Show the microphone in phantom lines : A 020-mm tapered hole (large end) with a 3-mm-wide slot on top is required for attaching the microphone to the holder. Lay out the holder and show the microphone in phantom lines.

Are citizens more likely to provoke inappropriate uses : For this assignment you need to submit your research methods section of your paper. You will need to explain how your study was carried out. What research design and methodology did you use? Your explanation needs to be clear enough that it would..

Certificate of deposit matures : Suppose your $50,000 certificate of deposit (CD) matures and you transfer the funds to your checking account. Suppose that the inflation rate has been 3 percent per year for several years, and the unemployment rate has been stable at 5 percent. Unant..

Design a noninverting amplifier : Lay out the design of the plate and include on the drawing the production and specification data that you would submit with your design.

Reviews

len1393712

2/14/2017 1:26:37 AM

I need help on this lab assignment. 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. 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.

Write a Review

Required(*) Message

User Account

All Pages