ECE 162 063
Lab 10 (April 3, 2014)
Geoffrey Andrews
April 10, 2014
Purpose
The purpose of this lab was to build an instrumentation amplifier to record the electrical signal from a
vibration sensor.
Theory
Many sensors operate by producing a potential diff
Filters
- Function: to retain components in a given range of frequencies and discard the
components in another range
- Two-port networks
Transfer Function
- The ratio of the phasor output voltage to the phasor input voltage as a function of
frequency
- H(
- The response of a network has two parts: the forced response and the natural response.
- In most circuits, the natural response decays rapidly to zero.
- The forced response for sinusoidal sources persists indefinitely and, therefore, is called
the stea
Transients
- Transients: the time-varying currents and voltages resulting from the sudden application
of sources, usually due to switching
First-Order RC Circuits
- Contain independent dc sources, resistances, and a single capacitance
Discharge of a Capac
Energy-Storage Elements
- Inductors and capacitors: can store energy and later return it to the circuit
- Passive elements
- Capacitance: the circuit property that accounts for energy stored in electric fields
- Inductance: accounts for energy stored in m
Series Resistances
- Req = R1 + R2 + R3 + + Rn
Parallel Resistances
- 1/Req = 1/R1 + 1/R2 + 1/R3 + + 1/Rn
- Only for two resistances: Req = R1R2/(R1 + R2)
Load: an element (such as a toaster or light bulb) that absorbs power
Electrical Network: Consists o
Voltage: a measure of the energy gained by a unit of charge as it moves through the
battery
- Units: volts (V) or joules per coulombs (J/C)
Current: the time rate of flow of electrical charge through a conductor or circuit element
- Units: amperes (A) or
ECE 162 063
Lab 9 (March 28, 2014)
Geoffrey Andrews
April 3, 2014
Purpose
The purpose of this lab was to study the op amp as a linear amplifier.
Theory
An operational amplifier, more colloquially known as an op-amp, is a component which amplifies input
vo
ECE 162 063
Lab 6 (March 21, 2014)
Geoffrey Andrews
March 28, 2014
Purpose
The purpose of this lab was to determine the phasor voltage across each element in an RLC circuit.
Theory
The behaviour of circuit elements when driven by an alternating current is
ECE 162 063
Lab 5 (February 21, 2014)
Geoffrey Andrews
February 28, 2013
Purpose
The purpose of this lab was to verify Kirchoff's voltage and current laws.
Theory
Kirchhoff's current and voltage laws are two fundamental principles of circuit analysis. Kir
ECE 162 063
Lab 4 (February 14, 2014)
Geoffrey Andrews
February 21, 2013
Purpose
The purpose of this lab was to study the electrical properties of a solar cell.
Theory
A solar cell is a semiconductor which produces a current in the presence of light as el
ECE 162 063
Lab 3 (January 31, 2014)
Geoffrey Andrews
February 7, 2013
Purpose
The purpose of this lab was to study the relationship between current, torque, and rotational speed of a
DC motor.
Theory
A motor produces torque when current is passed through
ECE 162 063
Lab 1 (January 17, 2014)
Geoffrey Andrews
January 24, 2014
Purpose
The purpose of this lab was to gain familiarity with using the lab equipment to build circuits and take
current and voltage measurements.
Theory
The protoboard can be used to c
HOMEWORK-6 SOLUTIONS
SOLUTIONS OF PROBLEMS FROM CHAPTER 8
19-b)
APPLICATION PROBLEMS
8)
SOLUTIONS OF PROBLEMS FROM CHAPTER 9
DRILL QUESTIONS
3) There are two roots (i values). The ERR is found using the MIRR function.
6) Figure 9.4 illustrates the periodi
Homework 3 solution
2. Since the random variable
values we can write
Pr f1/2
has a distribution with known critical
f/2 = 1
A little algebra allows us to rewrite this to give a 100(1 )% condence
interval on :
Pr
= 1 .
f/2
f1/2
So the desired interval i
Homework 2 solution
X1 +X3
= + = , so its unbiased.
2
2
+
X1 +X3 +Xn
= 3 = , so its unbiased.
3
X1 +X3 +3X2 X4
= +3 = 45 , so its biased
5
5
1 .
5
1. a) E
b) E
c) E
with bias equal to
=
d) E (3X1 2X3 ) = 3 2 = , so its unbiased.
e) E X1 X2 + Xn/2 Xn1 + X