General Electronics (CSCT2104)
Computer Science - COS
Semester: First Semester
Level: 200
Year: 2018
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SCHOOL: H.T.T.T.C DEPARTEMENT: CS LECTURER(S): Dr. DADA Jean-Pierre
COURSE CODE: FCS114 COURSE TITLE: General electronics OPTION: FCS 100
DATE: March ……., 2018 HALL: …….… TIME: 2 hrs NATURE: Exam
Instructions:……… Answer all questions………..
Exercise 1: Let us consider the figure below where is a resistor with the resistance . The limit
voltage of the diode is
.
The circuit is connected to a direct current generator having as
voltage V.
1.1. Represent on the figure the voltages at the ends of dipoles if
applicable.
1.2. Give the value of V so that the diode is blocked
1.3.Give the value of V from where the diode is passing
1.4.Give the values of the intensity passing through the circuit for the following cases:
, and .
Exercise 2: Let us consider the circuit below:
The capacitors have capacitance as high values. The generator of direct current has its internal resistor
null. The transistor has as characteristics: , and
. Also,
,
and
2.1.What type of electric circuit is this?
2.2.Why have we assumed that the capacitors have high values?
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2.3.Give the role of
2.4.By applying Kirchoff’s laws, write all functioning equations
2.5.Give the formula of the voltage amplification
2.6.Give the formula of the current amplification
2.7.List two possible applications of this circuit.
Exercise 3: Let us consider the circuit below:
3.1.Give the expression of the characteristic equations
3.2.Give the expression describing the output voltage in term of the input voltage.
3.3.Let us assume that
. Give the expression of the voltage amplification
3.4.What name can you give to this circuit?
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