Denition
L=
L=inductance
N =number
N 2 A
l
(H)
of turns in inductor
=permeability
of core
= 0 r
l=length
A=cross
sectional area
Formula
To remember this, take the equivalent formula for capacitors, swap C with L,
and swap i and v.
v=L
di
dt
Energy
E
Programming environments
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Mobilecomputing
Mobileuserinterfaces
Markuplanguages,mobilesecurity,mobileIP
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Mobileservices
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Location
48520 ELECTRONICS &
CIRCUITS
LECTURE 11
Amplifier Models
Basic Amplifier Concepts
Ideally, an amplifier produces an output signal
with identical wave shape as the input signal
but with larger amplitude.
3/17/2016
48520 E&C: Amplifier Models
2
1
Basic Ampl
48520 ELECTRONICS &
CIRCUITS
LECTURE 12
Frequency Response
Fourier Analysis
Most information-bearing signals are not
sinusoidal
Any (periodic) waveform can be
constructed by adding sinusoids with the
proper amplitude, frequency and phase
The French mathem
A.R. Hambley, Electrical Engineering (ed. 6)
CHAPTER 14
Worked Solutions for Exercises
E14.1
(a) iA
vA
RA
iB
vB
RB
vA
v o RF iF RF
RA
iF iA iB
(b) For the vA source, RinA
(c) Similarly RinB RB .
v A vB
RA RB
vB
RB
v
A RA .
iA
(d) In part (a) we f
Faculty of Engineering & Information Technology
48520 ELECTRONICS & CIRCUITS
OrCAD 16.3 Demo: Computer-Aided Circuit Analysis
2. Time Domain Analysis
Introduction
Time Domain Analysis (also called Transient Analysis or Large-Signal Analysis) allows us to
Faculty of Engineering & Information Technology
48520 ELECTRONICS & CIRCUITS
OrCAD 16.3 Demo: Computer-Aided Circuit Analysis
1. Basic DC Analysis
Preliminaries
1. If you have not installed the OrCAD 16.3 Demo on your computer, you need to install the sof
A.R. Hambley, Electrical Engineering (ed. 6)
CHAPTER 1
Worked Solutions for Exercises
E1.1
Charge = Current Time = (2 A) (10 s) = 20 C
E1.2
i (t )
E1.3
Because i2 has a positive value, positive charge moves in the same
direction as the reference. Thus po
PHYS2213Physics2EE
EdmundTse2007
Forapermanentmagnet,i=0,andH1L+H2l=0,so H iron=
H gap l
Bl
=
L
0 L
Magneticrecording
3headserase,write,read.
Readingthechangingfieldinthetapeinducesasignalinthecoil
Writingtimevariationinthewriteheadistranslatedtoaspacevar
Equivalent Circuits
Rth =
Rth -
VOC
Vth
=
ISC
IN
Thevenin resistance
to calculate this, short all voltage sources, open all current sources,
calculate resultant resistance
VOC = Vth =open
ISC = IN =short
circuit voltage (supply voltage in Thevenin circ
Inverting Conguration
The non-inverting (+) terminal is held at
0V ,
because that's the voltage of
the inverting () terminal.
This means that the 2 resistors behave like a normal voltage divider. However
you know the voltage at one end, and in the middle,
Edmund Li
D IPOLES
When two equal but opposite charges are separated by a short distance, a dipole is formed. Typical
examples of dipoles include transmission lines which are a parallel set of conductors. In this section,
we are interested in determining
Edmund Li
ELECTROMAGNETISM
Electromagnetics is the study of the effects of electric charges at rest and in motion resulting in an
electromagnetic field.
E LECTROMAGNETIC M ODEL
The electromagnetic model is based on several facts:
The electric charge of on
= arg(v) arg(i) = Arg (z)
power f actor = cos() =
P
|S|
Complex Power S
Measured in VA
Total power available
S = v = |Vrms | |Irms |
i
= P + jQ
Where
v
and
i
are complex numbers
P
= True (real) power
Q
= Reactive (imaginary) power
Apparent Power - |S|
Edmund Li
N ULL I DENTITIES
1.
The curl of the gradient of any scalar field is identically zero:
Conversely, if a vector field is curl free, then it can be expressed as the gradient of a scalar field.
For example, if
then we can define a scalar field V su
Edmund Li
V ECTOR A NALYSIS
A vector is a quantitiy with a magnitude and direction which can be expressed as a combination of n
components or coordinates:
. The norm (magnitude, length) of a vector
is the
scalar:
With the properties of:
1.
2.
3.
By using
Edmund Li
STATIC ELECTRIC FIELDS
In electrostatics, electric charges are at rest, and electric fields to not change with time; as such
there are no magnetic fields nor currents. Electrostatics is an important phenomena seen in
lightning, corona, oscillosc