ecet 220 i lab and homework

Laboratory Report Cover/Worksheet DeVry University College of Engineering and Information Sciences

Course Number: ECET220

Professor:

Laboratory Number: 1

Laboratory Title: Analysis of BJT Characteristics comprising of BJT Biasing using Simulation and Actual Construction

Submittal Date: Click here to enter a date.

Objectives:

Results:

Conclusions:

Team:
	Name		Program		Signature
	Name		Program		Signature
	Name		Program		Signature

Observations/Measurements:

III. A. 1. Theoretical circuit resistance values:

Measurements	Resistance (kΩ)
Base and +VCC =
Total Collector Resistance =

Table 1

III. A. 2. Circuit voltages:

Voltages	Voltage (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 2

III. A. 3. Circuit resistances and voltage values with R2 removed:

Measurements	Resistance (kΩ)
Base and +VCC =
Total Collector Resistance =

Table 3

Voltages	Voltage (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 4

III. A. 4. Circuit resistances and voltage values with R2 put back but R4 removed:

Measurements	Resistance (kΩ)
Base and +VCC =
Total Collector Resistance =

Table 5

Voltages	Voltage (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 6

III. B. 2. Multisim simulation and circuit voltages:

Voltages	Measured Voltages (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 7

III. B. 3. Answer the following questions:

a) How much current is passing through the emitter resistor in mA?

Current through emitter resistor =

b) What is the voltage drop across the collector load resistance (VRC) in V?

VRC =

c) What is the collector current in mA? Approximately.

Collector current =

III. B. 4. Multisim simulation and circuit voltages with R2 removed:

Voltages	Measured Voltages (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 8

III. B. 5. Answer the following questions:

a) What is the total resistance between the base and +VCC?

Total resistance, base and +VCC =

b) How much current is passing through the emitter resistor in mA?

Current of emitter resistor =

c) What is the voltage drop across the collector load resistance (VRC) in V?

VRC =

d) What is the collector current in mA? Approximately.

Collector current =

III. B. 6. Multisim simulation and circuit voltages with R2 put back and R4 removed:

Voltages	Measured Voltages (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 9

III. B. 7. Answer the following questions:

a) What is the total resistance between the base and +Vcc?

Total resistance, base and +VCC =

b) How much current is passing through the emitter resistor in mA?

Current of emitter resistor =

c) What is the voltage drop across the collector load resistance (VRC) in V?

VRC =

d) What is the collector current in mA? Approximately.

Collector current =

III. C. 1. Place a digital photo of your circuit below:

III. C. 3. Hardware circuit and circuit voltages:

Voltages	Measured Voltages (V)
VCC =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 10

III. C. 4. Answer the following questions:

a) Is the base positive or negative with respect to the emitter?

b) Is the base-to-emitter voltage close to 0.7 V?

c) Is the collector-to-emitter voltage less than Vcc?

d) Is the collector-to-emitter voltage greater than 0.3 V?

e) How much current must be passing through the emitter resistor in mA?

f) What is the voltage drop across the collector load resistance (VRC) in V?

g) What is the collector current in mA? Approximately.

h) Is the collector more positive or negative than the base?

i) Is the collector-base junction forward or reverse biased?

j) Is the transistor operating in cutoff, linear or saturation region?

III. C. 5. Hardware circuit and circuit voltages with R2 removed:

Voltages	Measured Voltages (V)
Vcc =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 11

III. C. 6. Answer the following question:

a) What is the total resistance between the base and +Vcc?

b) Is the base-to-emitter voltage close to 0.7 V?

c) Is the collector-to-emitter voltage less than Vcc?

d) Is the collector-to-emitter voltage greater than 0.3 V?

e) How much current must be passing through the emitter resistor in mA?

f) What is the voltage drop across the collector load resistance (VRC) in V?

g) What is the collector current in mA? Approximately.

h) By removing R2 and therefore changing the value of the base-to-VCC resistance. Has it changed the collector-to-emitter voltage? How?

i) By removing R2 and therefore changing the value of the base-to-VCC resistance. Has it changed the collector current? How?

j) By removing R2 and therefore changing the value of the base-to-VCC resistance. Has it changed the base-to-emitter voltage? By how much?

k) By removing R2 and therefore changing the value of the base-to-VCC resistance. Has it changed the emitter current? How?

l) Is the transistor operating in cutoff, linear, or saturation region?

III. C. 7. Hardware circuit and circuit voltages with R2 put back and R4 removed:

Voltages	Measured Voltages (V)
Vcc =
Emitter to common =
Base to common =
Collector to common =
Base to emitter =
Collector to emitter =

Table 12

III. C. 8. Answer the following question:

a) What is the total resistance between the base and +Vcc?

b) Is the base-to-emitter voltage close to 0.7 V?

c) Is the collector-to-emitter voltage less than Vcc?

d) Is the collector-to-emitter voltage greater than 0.3 V?

e) How much current must be passing through the emitter resistor in mA?

f) What is the voltage drop across the collector load resistance (VRC) in V?

g) What is the collector current in mA? Approximately.

h) By removing R4 and therefore changing the value of the base-to-VCC resistance. Has it changed the collector-to-emitter voltage? How?

i) By removing R4 and therefore changing the value of the base-to-VCC resistance. Has it changed the collector current? How?

j) By removing R4 and therefore changing the value of the base-to-VCC resistance. Has it changed the base-to-emitter voltage? By how much?

k) By removing R4 and therefore changing the value of the base-to-VCC resistance. Has it changed the emitter current? How?

l) Is the transistor operating in cutoff, linear, or saturation region?

IV. Summary – Please answer the following questions:

a) Did your theoretical calculations closely match the results obtained from the Multisim simulation? (Yes, No)

Comments:

  

b) Did your theoretical calculations closely match the results obtained from the Proto Board circuit? (Yes, No)

Comments:

c) Did your results obtained from the Multisim simulation closely match the results obtained from the Proto Board circuit? (Yes, No)

Comments:

Deliverable	Points Available	Points Achieved
Laboratory Cover page	5
Working Circuit(s)/Simulation	8
Observations/Measurements	10
Questions	7
Total Points	30
Comments:

ECET-220 Lab 1 Worksheet DeVry University Page 7 of 8