Assignment 1 of ELEG2202
Deadline January 17, 2014
1. What are the differences between independent sources, realistic
sources and controlled sources?
2. Determine the power being absorbed by each of the circuit elements
shown in Fig.1-1.
Fig .1-1
3. Deter

Quiz in tutorial #3
2014.3.25
1. In the circuit shown in Fig. 1, the voltage at the emitter was measured and found to be
0.7 V. If = 50, find IE, IB, IC, and VC. (30)
IE=(-0.7+10)/10k= 0.93mA
Ib=Ie/51=0.018mA
Ic=Ib*50=0.91mA
Vc=10-5k*Ic=5.44V
Fig. 1
2. To

Quiz in tutorial #3
2014.3.25
1. In the circuit shown in Fig. 1, the voltage at the emitter was measured and found to be
0.7 V. If = 50, find IE, IB, IC, and VC. (30)
Fig. 1
2. To analyze the circuit of Fig. 2 to determine the voltages at all nodes and th

Quiz in tutorial #4
The emitter follower in the following figure is used to connect a
source with Rsig = 10 k to a load RL = 1 k. The transistor is biased at
I = 1mA, utilizes a resistance RB = 40 k and has

Quiz in tutorial #4
The emitter follower in the following figure is used to connect a
source with Rsig = 10 k to a load RL = 1 k. The transistor is biased at
I = 1mA, utilizes a resistance RB = 40 k and has = 100.
1. Draw the DC equivalent
circuit.(10)
3.

2
1. a) =
1 +2
= 3
b) = = 3V
= (6 2 )
c)The load line is as following:
The x intercept is 3V, and the y intercept is 6mA.
= = 3V
d) By solving cfw_
= ( () )2
we can get
cfw_
e)
2.
= 2.8, 16.8(, )
= 0.4
= = 0.2
= = 9.2
= ( )
1
1 +2
= 6.67,
= 0

Chapter 1: Basic Concepts
Basic Circuit Elements and Laws
Definition of a circuit
l
A circuit = the path of flow for charge carriers
To communicate from one point to another
To transfer energy from one point to another
l
Charge carriers are
electrons i

Chapter 2:
Circuit Analysis Methods
Topics To Cover
l
Basic Circuit Laws
l
Nodal Analysis
l
Mesh Analysis
l
Textbook:
Chapters 2 & 3.
Some definitions
R
a
v1
R
2
c
v2
f
l
b
1
d
R5
R3
e
R7
I
R6
R4
g
Node
a point where two or more circuit elements join

Chapter 3:
Basic Circuit Theorems
Topics To Cover
Linear Circuit and Principle of Superposition
l Thevenins Equivalent Circuit Theorem
l Maximum Power Transfer Theorem
l Source Transformation
l Nortons Equivalent Circuit Theorem
l
l
Textbook
Chapte

Chapter 4: AC Circuit Analysis
Sinusoidal Supply and Phasor
Topics To Cover
l
Time Domain Analysis
R/L/C response to Sinusoidal Supply
l
Concept of Phasor
l
Phasor Transformation
l Impedance of R/L/C
l AC Circuit Analysis using Impedance
l

Chapter 5: AC Circuit Analysis
Continued
Topics To Cover
Superposition, Source Transformation
l AC Power Analysis
l
RMS Power
Real and Complex Power
l
Textbook: Chapters 10, 11.
Superposition
Important: When the circuit has two (or more) sources
op

Two-Port Networks
One-port network:
Two-terminal devices/circuits
e.g. resistor, capacitor, inductor
Two-port network:
Four-terminal circuits
Two separate ports for inputs and
outputs
e.g. transistor, operational amplifiers,
transformers
1
Impedance Pa

Field Effect Transistor (FET)
Field-effect transistors (FETs) are another type of transistor which
relies on voltage instead of current to control its gain
widely used in both analogue and digital applications
they have a very high input resistance (no

Introduction to three phase power
Mains electrical power generating stations produce 3 emfs of equal
magnitude but separated in phase by 120
The three generators may be in star or delta configuration:
a
a
~
V0120
V0
n
~
~
Vca
V0 120
Vab
~
b
c
c
Star point

ELEG 2202 2014-2015 First Term
Assignment 5 (Due 1/12/2014)
1. [30] In the saturation region, the drain current of an n-channel enhancement MOSFET as
shown in the following figure can be expressed as I D k VGS VGS (th ) where VGS (th ) is
2
the minimum (t

Quiz in Tutorial #2
(2014.Mar.18)
Q1. (50 points) In the circuit shown in Fig. 1, I is a dc current and vs is a small sinusoidal signal.
Capacitors C1 and C2 are very large; their function is to couple the signal to and from the diode
but block the dc cur

Quiz in Tutorial #2
(2014.Mar.18)
Q1. (50 points) In the circuit shown in Fig. 1, I is a dc current and vs is a small sinusoidal signal.
Capacitors C1 and C2 are very large; their function is to couple the signal to and from the diode
but block the dc cur

Assignment 2 of ELEG2202
Deadline January 24, 2014
(It is allowed to use a scientific calculator in numerical calculations)
Problem 1
(a) Consider the Wheatstone Bridge shown in the figure below. Calculate voltage va - vb ,
and
(b) Rework part (a) if the

Assignment 3 of ELEG2202
Deadline January 30, 2014
(It is allowed to use a scientific calculator in numerical calculations)
Problem 1
Find the mesh currents i1, i2, and i3 in the network.
Problem 2
Find vx, and ix in the circuit shown below.
Problem 3
Giv

Assignment 4 of ELEG2202
Deadline February 14, 2014
(It is allowed to use a scientific calculator in numerical calculations)
Problem 1
Problem 2
Problem 3
Problem 4
1
Problem 5
Problem 6
Problem 7
Problem 8
2
Problem 9
Problem 10
Problem 11
Problem 12
Wha

Assignment 5 of ELEG2202
Deadline February 21, 2014
Problem 1
The equivalent model of a certain op amp is shown
in the figure. Determine:
(a) the input resistance
(b) the output resistance
(c) the voltage gain in dB.
Problem 2
Obtain vo for the op amp cir

Assignment 6 of ELEG2202
Deadline February 25, 2014
Problem 1
A noninverting current amplifier is portrayed in the figure.
Calculate the gain io/is. Take R1 = 8 k and R2 = 1 k.
Problem 2
Refer to the bridge amplifier shown in the
figure.
Determine (1) the

Assignment 7 of ELEG2202
Deadline: March 14, 2014
Problem 1
For the circuits shown in Fig. 1, using the constant-voltage-drop (VD = 0.7 V)
diode model, find the voltages and currents indicated.
Figure 1
Problem 2
In the circuit shown in Fig. 2, I is a dc

Assignment 8 of ELEG2202
Deadline: March 21, 2014
Problem 1 In the circuit shown in Fig. 1, the voltage at the
emitter was measured and found to be 0.7 V. If = 50, find IE,
IB, IC, and VC.
(Ans. 0.93 mA; 18.2 A; 0.91 mA; +5.45 V)
Figure 1
Problem 2
In the

Assignment 9 of ELEG2202
Deadline: March 28, 2014
Problem 1 A BJT having = 100 is biased at a dc collector current of 1 mA. Find
the value of gm, re, and r at the bias point.
(Ans. 40 mA/V; 25 ; 2.5 k)
Problem 2
In the circuit of Fig. 2, VBE is adjusted t

Assignment 10 of ELEG2202
Deadline: April 4, 2014
Problem 1 For the follower circuit in Fig. 1 let transistor Q1 have = 20 and
transistor Q2 have = 200, and neglect the effect of r0. Use VBE = 0.7 V.
(a) Find the dc emitter current of Q1 and Q2. Also find

Assignment 11 of ELEG2202
Deadline: April 11, 2014
Problem 1 Design the circuit of Fig. 1 so that the
transistor operates in saturation with ID = 0.5 mA and
VD = +3 V. Let the enhancement-type PMOS transistor
have Vtp = 1 V and kp (W L) = 1 mA/V2. Assume