TAMPERE UNIVERSITY OF TECHNOLOGY
Institute of Communications Engineering
TLT-8016 Basic Analog Circuits
Problem
Max. Points
1
2
3
4
5
Total:
10
10
10
10
10
50
Result
2005/2006
Examination 3
24.04.2006
Family Name:
Given Name:
Student Number:
E-mail Address:
Final Mark:
Please, write your answers in English.
BEST WISHES FOR SUCCESSFUL WORK & RESULTS !
TLT-8016 Basic Analog Circuits
2005/2006
Examination 3
Problem 1
24.04.2006
10 pt.
Define briefly the following terms and answer shortly to the questions (1pt per correct answer):
1. Voltage gain;
2. Current gain;
3. Power gain;
4. Inverting and non-inverting amplifier;
5. Power supply efficiency;
6. Slew-rate;
7. Rectifier circuit;
8. Draw the circuit symbol of an npn BJT and show the BJT terminals in it;
9. How much is the voltage gain of the emitter follower?
10. Differential amplifier.
2
TLT-8016 Basic Analog Circuits
2005/2006
Examination 3
Problem 2
24.04.2006
10 pt.
Plot the circuit of the inverting amplifier, realized with operational amplifier. Derive the formula for its
voltage gain, input and output impedance.
3
TLT-8016 Basic Analog Circuits
2005/2006
Examination 3
Problem 3
24.04.2006
10 pt.
In the Figure 3.1 below is given the family of the output characteristics of BJT 2N2222. Plot the load
line, if the collector resistor RC is equal to 1 kΩ and the supply voltage VCC is equal to 9V, as it is shown
in Figure 3.2. Determine the quiescent point, corresponding to base current IB equal to 20µA. (If you do
not have plotting instruments plot the load line with free hand.)
Figure 3.1.
RC
1kΩ
VCC
9V
IB
20µA
Figure 3.2.
4
+
-
TLT-8016 Basic Analog Circuits
2005/2006
Examination 3
Problem 4
24.04.2006
10 pt.
In the Figure 4.1 is shown the basic circuit of common-emitter amplifier. Which elements in it define
the low-frequency region and which elements define the high-frequency region?
Figure 4.1.
5
TLT-8016 Basic Analog Circuits
2005/2006
Examination 3
Problem 5
24.04.2006
10 pt.
How the negative feedback in the amplifier affects:
• the gain;
• gain stability;
• nonlinear distortion;
• noise;
• input and output impedance?
6