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Cover page
Table of Contents
1.Introduction In this Chapter, you may give a brief introduction of the common emitter amplifir, and, especially, the aim and objectives of the assignment.
2.Practical Measurement 2.1 Experimental Circuit 2.2 Experimental Equipment and Components 2.3 Experimental Procedure 2.4 Experimental Results 2.4.1 DC Conditions of Single Amplifier 2.4.2 Midband Gain of Single Amplifier 2.4.3 Frequency Response of Single Amplifier with Single Cc 2.4.4 Frequency Response of Single Amplifier with Double Cc 2.4.5 DC Conditions of Cascaded Amplifier (Note: If you have done the optional part) 2.4.6 Frequency Response of Cascaded Amplifier (Note: If you have done the optional part)
3. Theoretical Analysis 3.1 DC Conditions of Single Amplifier 3.2 Midband Gain of Single Amplifier 3.3 High Cut‐off Frequency of Single Amplifier 3.3.1 Cut‐off Frequency with Single Cc 3.3.2 Cut‐off Frequency with Double Cc 3.3.3 Cut‐off Frequencies with Cc=705pF, Cc=470pF/2 and Cc=0 3.4 DC Conditions of Cascaded Amplifier 3.5 Midband Gain of Cascaded Amplifier
4. PSPICE Simulation 4.1 DC Conditions of Single Amplifier 4.2 Midband Gain of Single Amplifier 4.3 Frequency Response of Single Amplifier With Single Cc 4.4 Frequency Response of Single Amplifier With Double Cc 4.5 Frequency Response of Single Amplifier With Cc=705pF, Cc=470pF/2 and Cc=0 4.6 DC Conditions of Cascaded Amplifier 4.7 Frequency Response of Cascaded Amplifier
5. Results Analysis
6. Conclusion
References
Appendixes
LAB 3 WORK SHEET
Date:
Group Members and Signature
Group
Name
Signature
A7
Hamed Al-Farsi
A7
Fahad Al-Shammari
A7
Fasial Al-Abulla
A7
Dipesh ayal
Measurement of the resistor’s values.
Name of Resistors
Expected Value (Ω)
Measured Value(Ω)
R1
56K
56K
R2
22K
21.8K
4.7K
4.7K
180
179
3.3K
3.3K
10K
10K
1.0K
1.0K
Task 1: DC Voltages
Build the DC circuit in Fig.1
Task 2 : The Midband Gain at 5kHz.
Build the amplifier circuit in Fig.2
Frequency
Voltage Gain (
20mv
5kHz
30mv
1.5mv
Task 3: Frequency Response fir the Amplifier in Figure 2.
Frequency (Hz)
Voltage Gain (
10
2.3*20m=.046
46v/20m=2.3v
50
1*0.2=0.2v
0.2v /20m=
100
1.9*0.2=0.38v
0.38v /20m=
200
1*0.5=0.5v
0.5v /20m=
500
1.2*0.5=0.6v
0.6v /20m=30v
1k
1.2*0.5=0.6v
0.6v /20m=30v
5k
1.2*0.5=0.6v
0.6v /20m=30v
10k
1.2*0.5=0.6v
0.6v /20m=30v
20k
1.2*0.5=0.6v
0.6v /20m=30v
30k
1.2*0.5=0.6v
0.6v /20m=30v
40k
0.9*0.5=0.45v
0.45v/20m=22.5v
45k
4*0.1=0.4v
0.4v/20m=20v
50k
3.85*0.1=0.385v
0.385v/20m=19.25v
60k
7.4*50mv=0.37v
0.3v/20m=18.5v
80k
6*50mv=0.3v
0.3v /20m=15v
100k
4.8*50mv=0.24v
0.24v /20m=12v
Task 4: Frequency Response for the amplifier in Figure 2 with Double
Frequency (Hz)
Voltage Gain (
10
2.2*20mv=0.044v
0.044v/20m=2.2v
50
2.1*0.1=0.21v
0.21v /20m=10.5v
100
2.4*0.2=0.48v
0.48v /20m=24v
200
4.8*0.1=0.48v
0.48v /20m=24v
500
2.8*0.2=0.56v
0.56v /20m=28v
1k
2.9*0.2=0.58v
0.58v /20m=29v
5k
5.8*0.1=0.57v
0.57v /20m=28.5v
10k
5.2*0.1=0.52v
0.52v /20m=26v
20k
4.2*0.1=0.42v
0.42v /20m=21v
25k
3.9*0.1=0.39v
0.39v /20m=19.5v
30k
3.5*0.1=0.35v
0.35v /20m=17.5v
40k
5.8*50mv=0.29v
0.29v /20m=14.5v
50k
4.9*50mv=0.245v
0.245v /20m=12.25v
70k
3.8*50mv=0.19v
0.19v /20m=9.5v
100k
2.7*50mv=0.135v
0.135v /20m=6.75v
Optional items:
7.1 Task 1: DC Values for Q1+Q2
Build the circuit in figures 3 and measure the DC voltages of the base and emitter of Q2
9.92v
9.35v
7.2 Task 2: Midband Gain and Frequency Response
(peak-to-peak)
Frequency
(peak-to-peak)
Voltage Gain (
10mv
2kHz
2.6*0.5=1.3v
1.3/10mv=130v
Frequency (Hz)
Voltage Gain (
10
1.8*50m=0.09v
0.09v /10mv=9v
50
4.8*0.1=0.48v
0.48v /10mv=48v
100
4*0.2=0.8v
0.8v /10mv=80v
200
5.4*0.2=1.08v
1.08v /10mv=108v
500
6*0.2=1.2v
1.2v /10mv=120v
1k
6.2*0.2=1.24v
1.24v /10mv=124v
5k
5.6*0.2=1.12v
1.12v /10mv=112v
10k
4.4*0.2=0.88v
0.88v /10mv=88v
15k
3.2*0.2=0.64v
0.64v /10mv=64v
20k
2.8*0.2=0.56v
0.56v /10mv=56v
25k
4.5*0.1=0.45v
0.45v /10mv=45v
50k
5.1*50mv=0.255v
0.255v /10mv=25.5v
70k
4*50mv=0.2v
0.2v /10mv=20v
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