ELEG 4201 Homework 3
Assigned: 3 November, 2015; Due: 5pm, 10 November, 2015
1. Sizing a chain of complex gates.
A
Cin=5fF
1
B
S3
1
S4
s2
C
CL=1pF
1
D
Out
1
S0
S1
The circuit shown above is a 4-input multiplexer. For S1 S0 = 00,01,10 and 11, the input A,
ELEG 2202 2014-2015 First Term
Assignment 4 (Due 17/11/2014)
1. [25] (a) Determine whether the following p-n junction diode is ON or OFF.
(b) Evaluate the voltages V1 and V2.
2. [25] Given that the common emitter current gain is =100 and VBB=2.0V, determi
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
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
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
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
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
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 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 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 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
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
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.
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 #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 #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 #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
Quiz in Tutorial #1
(2014.Mar.11)
Q1. (100 points) Please sketch the I-V (current and voltage) relation graph of the following
elements.
Example: The I-V relation of a resistor.
I
slope
R
I
V
0
1
R
V
(a) Resistor
(b) Resistor I-V relation
(1) (5 points)
Quiz in Tutorial #1
(2014.Mar.11)
Q1. (100 points) Please sketch the I-V (current and voltage) relation graph of the following
elements.
Example: The I-V relation of a resistor .
I
slope
R
I
V
0
1
R
V
(a) Resistor
(b) Resistor I-V relation
(1) (5 points)
Matching Circuit Problem for Practice
Fig. 1 is a circuit with power supply circuit part, matching circuit part and load.
a) Please find the Thevenin equivalent at terminals a-b of power supply circuit part.
b) Matching circuit is added for maximum averag
ELEG2202 Laboratory4
ELEG1110C Laboratory 5
Department of Electronic Engineering
The Chinese University of Hong Kong
Experiment Operational Amplifiers
Introduction
The op-amp is one of the most important functional blocks for a very wide range of applicat
ELEG2202 Laboratory3
Department of Electronic Engineering
The Chinese University of Hong Kong
Experiment 3 Semiconductor diode and Zener diode
1 INTRODUCTION
Resistors, capacitors, inductors are classified as passive elements because they cannot generate
111Equation Chapter 1 Section 1ELEG2202
Laboratory2
Department of Electronic Engineering
The Chinese University of Hong Kong
Experiment 2 Time Constant, Integrator and Differentiator
1 INTRODUCTION
In Experiment 2, we have learnt the AC characteristics of
ELEG 2202 - Laboratory 1
Department of Electronic Engineering
The Chinese University of Hong Kong
Experiment 1 - Sinusoidal Response of RC Circuits
1 INTRODUCTION
Resistors (R), capacitors (C) and inductors (L) form the basic elements of any circuit. In t
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
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