Analysis of the circuit and calculations of voltages

Assignment Help Electrical Engineering

Reference no: EM131069561

Transistor Biasing

Lab is based on the fundamentals of a transistor biasing and the analysis of the circuit.

The goal of Transistor Biasing is to establish a known Q-point in order for the transistor to work efficiently and produce an undistorted output signal. In bipolar transistor circuits, the Q-point is represented by ( VCE, IC ) for the NPN transistors or ( VEC, IC ) for PNP transistors.

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:

Materials:

• Hardware Parts (In the Toolbox):

o An NPN transistor: 2N3904
o Four resistors: 1 kΩ, 470Ω, 3 kΩ and 6 kΩ
o Jumper wires

Equipment:

• Hardware Equipment:

o Breadboard
o NI myDAQ Instrument device
o Screw Driver
o Screw Terminal connector
o USB Cable
o Multimeter with probes
o Multimeter from NI ELVISmx Instrument Launcher

Procedure:

*** This lab has to be implemented only in hardware (using NI myDAQ) ***

1. Analyze the circuit in the Figure 1 below to calculate the following values: V_BB, V_E, I_E, V_C and V_CE. Make sure to include 20% tolerance for each resistor in the calculations.

2. Construct the circuit shown in Figure 1 below on the breadboard using the transistor and two resistors (RCand RE).

1699_Circuit Diagram.jpg

Figure 1

3. Using the jumper wires, screw driver and screw terminal connector, connect the board to NI MyDAQ Instrument Device.

4. Use channel +15V pin out on the NI myDAQ Instrument Device to provide the supply voltage (VCC). Use channel AI0 to measure the required voltages: VBB, VE and VC and currents: IC and IE using the Multimeter.

5. Tabulate the data from step 1 and step 5.

	Calculated	Measured
V_BB
V_E
V_C
I_E
I_C

6. Short the resistor R2 and calculate the values in steps 1.

7. Modify the circuit in Figure 1 to short the resistor R2 and measure the values in step 4.

	Measured values with R2 shorted
V_BB
V_E
V_C
I_E
I_C

Review questions:

1. Compare a calculated and measured values in the table. Discuss whether the values are the same of different. If they are different, provide the reasoning. And how to reduce this difference between calculated and measured values.

2. What happens when R2 is shorted? Why does the measured values change?

3. If the NPN transistor is replaced with a PNP transistor, how does the change in the transistor effect the current and voltage in the circuit?

Deliverables:

1. Analysis of the circuit and calculations of voltages: V_BB, V_E and V_C and currents: I_C and I_E.

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 Multimeter on the NI ELVISmx Instrument Launcher on your screen.

Reference no: EM131069561

Questions Cloud

Equilibrium price and quantity in the market : 1. Using Microsoft Excel, draw a graph illustrating the supply and demand in this market. 2. What is the equilibrium Price and Quantity in the market?

How letter a is transmitted in an electrical and radio wave : Create a detailed diagram or set of diagrams to show how the letter A is transmitted in an electrical, light, and radio wave. Show the similarities and differences between how data is transmitted in these three processes.

Does such a professional code of ethics protect engineers : Read this article. The post should address the main question of this article - what is it to think like an engineer? (according to the author? according to you?) Is having a professional code of ethics part of "thinking like an engineer", and d..

Type of market participant demands the euro : In the day-to-day foreign exchange market what type of market participant demands the euro? What type of market participant supplies the euro? Explain.

Analysis of the circuit and calculations of voltages : Analysis of the circuit and calculations of voltages: VBB, VE and VC and currents: IC and IE. What happens when R2 is shorted? Why does the measured values change?

Exercise of the sars : If Maria is in the 35 percent marginal tax bracket, what is her after-tax cash flow from the exercise of the SARs? Does Handcock Corporation get a tax deduction for the SARs and if yes, when and in what amount?

Larger or smaller role of government in the economy : Discuss whether you favor a larger or smaller role of government in the economy. Refer to concepts found in the reading to support your opinion.

In what ways have the companies discussed in the case : In what ways have the companies discussed in the case benefited? Provide several examples.

Provide a strategic recommendation to solve the issue : 2. Provide a strategic recommendation to solve the issue (theory or any strategic method ) and lessons learned from the case.

User Account

All Pages