ELEC2142 Theory Test Solutions
Matthew Davis
m.davis@student.unsw.edu.au
20th December 2013
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These solutions are for the theory test in preparation for ELEC2142.
These solutions are not aliated with the School of Electrical Engineering and Telecom
diary off
fid = fopen(my_files_name,'w');
cfw_Undefined function or variable 'my_files_name'.
clc
x = -3
x =
-3
clc
x = -3;
y = exp(x);
fprintf('x = %2.2', x);
x = fprintf('x = 02.2', x);
x = -32.2fprintf('x = %2.2d', x);
x = -03fprintf('x = 3%2.2', x)
SECTION 3: TRANSISTOR AMPLIFIERS:
SMALL SIGNAL ANALYSIS & DC
BIASING
3.1 The BJT Small-Signal Model
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
Linearization and Definition of g-parameters
Early effect and Determination of ro
Low Frequency Hybrid- Model
Full Hybr
SECTION 4: FREQUENCY RESPONSE
OF TRANSISTOR AMPLIFIERS
4.1 Review of Bode Plots
4.1.1 Amplitude & Phase Response. Decibel Scale
4.1.2 Rules for Making Bode Plots. Amplifier Bandwidth
4.2 Tools for Frequency Analysis
4.2.1 Relationship Between Poles & Time
SECTION 7: Non-Linear Circuits
7.1 Oscillator Circuits
7.1.1 Introduction Conditions for Oscillation
7.1.2 Op-Based Oscillator: The Wein Bridge
Oscillator
7.2 Schmitt Trigger
Aims
After this section the student should know:
Basic conditions for oscillato
SECTION 6: FEEDBACK
STABILITY & COMPENSATION
6.1 Introduction
6.2 Effect of Feedback on Amplifier Poles
6.2.1 Single Pole System
6.2.2 Two Pole System
6.2.3 Three Pole System
6.3 Stability Criteria
6.3.1 Nyquist Criterion
6.3.2 The Gain & Phase Margins
6.
WEEK 2-2016
Operational Amplifiers
(
Sedra
Smith
page
ELEC2133: Analogue Electronics
Microelectronic
94-151
Thettim
)
Circuits
r@
The Ideal Op-Amp
Basic Properties
Direct Coupled
High gain
Differential input: + and or inverting and non-inverting inputs
S
WEEK 1-2016
Introduction
ELEC2133: Analogue Electronics
Analogue Electronics
Deals with analogue signal
Continuous in value
Analysis and design more complex than digital systems
Less automatized
Not as expensive as digital counter part
Applications
Dig
THE UNIVERSITY OF NEW SOUTH WALES
SCHOOL OF ELECTRICAL ENGINEERING AND TELECOMMUNICATIONS
ELEC2133 ANALOGUE ELECTRONICS
ASSIGNMENT II
Due Date: Friday 23 October, 2015
Assignments submitted after this date will attract a penalty of 10% per day. No
assignm
THE UNIVERSITY OF NEW SOUTH WALES
SCHOOL OF ELECTRICAL ENGINEERING AND
TELECOMMUNICATIONS
ELEC2133 ANALOGUE ELECTRONICS
ASSIGNMENT I
Due Date: Friday Sep 18, 2015
Assignments submitted after this date will attract a penalty of 10% per day. No
assignment t
THE UNIVERSITY OF NEW SOUTH WALES
SCHOOL OF ELECTRICAL ENGINEERING AND TELECOMMUNICATIONS
ELEC2133 ANALOGUE ELECTRONICS
ASSIGNMENT II
Due Date: Monday 17 October, 2016 (11:59am)
Assignments submitted after this date will attract a penalty of 10% per day.
THE UNIVERSITY OF NEW SOUTH WALES
SCHOOL OF ELECTRICAL ENGINEERING & TELECOMMUNICATIONS
ELEC2133 ANALOGUE ELECTRONICS
Assignment 1
Due Date: 12 noon, Monday 19th Jan 2015 (Week 6)
Assignments submitted after this date will attract a penalty of 10% per day
SECTION 5: FEEDBACK IN AMPLIFIERS
5.1 The Feedback Concept
5.2 The Four Basic Feedback Topologies
5.2.1 Series-Shunt
5.2.2 Shunt-Series
5.2.3 Series-Series
5.2.4 Shunt-Shunt
5.2.5 Determining The Topology
5.3 Properties of Negative Feedback
5.3.1 Gain Des
Solutions to ELEC2133 Extra Past Exam
Questions
Matthew Davis
m.davis@student.unsw.edu.au
10th November 2014
Abstract
These solutions are for ELEC2133 ExtraPastExamQuestions results-only.pdf.
These solutions are not aliated with the School of Electrical E
Edmund Li
Decoding Machine Language
For each 32 bits:
We look at bits 25-27. A 00X is a data processing instruction. 01X is a load/store
instruction and 101 is a branch instruction.
We then use the instruction type to determine which fields exist and co
Edmund Li
Multiplication by hand
Example
The following is a multiplication of 4.4 fixed point fractions. The result is also to be
interpreted in 4.4 fixed point format. We shall assume that the least significant and most
significant 4 bits are discarded f
Edmund Li
Load /Store Instructions
The load/store instruction representation is also in a 32 bit format.
56
Bit 25 is used to determine whether the offset is an immediate (0) or an
immediate shifted register (1).
Bit 24 (P) indicates whether it is pre-ind
Edmund Li
33 Floating Point Numbers
So far, we have only learnt how to work with integers. What about very large and small
numbers? These are represented as floating point numbers. Floating point numbers are
based on the scientific notation which consists
Edmund Li
IEEE 754 Floating Point Standard
Sign Bit
A 1 indicates a negative number, and a 0 indicates a positive floating point number.
Significand
The leading 1 is implied for normalized numbers.
Exponent
Since we want an easy comparison, representing e
Edmund Li
36 I/O Interfacing
The computer consists of 5 basic components: control, data path, memory, I/O.
I/O is an important component of the computer since it allows humans to interact with
the system. Some of the most common inputs and output devices
Edmund Li
This code does not take into account of shifting errors that could cause the answer to be
less by 1. We do this by calculating the remainder which should normally be:
10 = [0,9]
10
But if the quotient is less by 1 then:
10 = [10,19]
10
The met
Edmund Li
34 Fractions and Fixed Point
If we want to use all the bits for accuracy, we use fixed point fractions. Fixed point
fraction is an implicit data type in which we can define the radix point anywhere we choose.
Suppose we have 32 bits and we wish
METAL OXIDE SEMICONDUCTOR FIELD
EFFECT TRANSISTORS (MOSFETS)
Just like with BJTs, there are two types of MOSFETS:
N-channel: conduction only occurs with electrons.
P-channel: conduction only occurs with holes
DEVICE STRUCTURE
Li
An n-channel MOSFET is fab
WEEK 4-2016
Transistor Amplifiers: DC biasing,
Transistor Models and Small Signal
Analysis (Part 1)
ELEC2133: Analogue Electronics
Aims
To develop circuit model for transistor
Circuit analysis of amplifier circuit consisting of transistor is
possible
I
Name: _
Student ID: _
Signature: _
THE UNIVERSITY OF NEW SOUTH WALES
School of Electrical Engineering & Telecommunications
FINAL
EXAMINATION
Session 2 2013
ELEC2133
Analogue Electronics
TIME ALLOWED:
TOTAL MARKS:
TOTAL NUMBER OF QUESTIONS:
3 hours
100
4
T
WEEK 5-2016
Transistor Amplifiers: DC biasing,
Transistor Models and Small Signal
Analysis (Part 2)
ELEC2133: Analogue Electronics
Small Signal Model: MOSFETs
Linearization and graphical analysis
Concerned with small signal variations about the
operatin
Figure 1 shows an operational-amplifier circuit with input V; and output V0.
You may assume that the op-amp is idea].
i) By deriving a relationship between the output and the input, show that
this circuit is an ideal differentiator. [3 marks]
R
Vi 0i V