State University of New York at Stony Brook
Department of Electrical and Computer Engineering
ESE 211 Electronics Laboratory A
Lab 3: Measurement of AC signals
1. Objectives
1) Set up a signal generator and determine the generator equivalent circuit.
2) S

ESE 121
Spring 2017
Homework 2
1. If I=25,000 time the threshold of hearing, what is the difference in db?
2. Mathematically prove that the threshold of pain is 130db. (Show an equation and solution)
3. If one speaker is quieter than another, what is the

ESE 121 Homework 4
1. Low pass filter
Capacitor here is parallel to the output. Hence, more current will flow to load to
capacitor if their resistance is lower.
To high frequencies, the capacitor looks like a resistor, becoming negligible as the
frequency

ESE 121 Homework 3
P
V
40 W
=
120 V
1
A
=
3
P
Current I in 6W lightbulb =
V
6W
=
120 V
1
A
=
20
=0.05A
1. Current I in 40W lightbulb =
2. Power consumed by the TV = VI
= 120V*0.46A
= 55.2W
3. a) Resistance for series = 2*4 =8 Ohm
1
b) Resistance for paral

ESE 121
Homework 1
Fall 2016
1. If the peak amplitude of a sine wave is 3V (volts).
a. Determine the peak-to-peak amplitude.
b. Determine the RMS amplitude.
2. A guitar string is 90cm long. It has a fundamental frequency of 420Hz.
a. Determine the speed o

ESE 121
Homework 3
Fall 2016
1. What is the current in a 40W light bulb connected to a 120V outlet? An equivalent LED light
is only 6.0W, what is the current for the LED bulb connected to a 120V outlet?
2. An LED TV draws 0.46A of current If its plugged i

ESE 121
Homework 5
Fall 2016
Name:
Id:
For the following assignment you may use any source available. Your responses must be in
complete sentences, typed, and double spaced. Length is not an issue, just make sure your
answer is complete. A few sentences f

ESE 121 Homework 1
1. a) Peak-to-peak amplitude=2*peak amplitude=2*3=6Vpeak to peak
b) RMS amplitude of a sine wave=
peak amplitude
2
=
3
2
Vrms =1.5
2 Vrms
2. a) fundamental frequency=420Hz
wavelength = (90cm)*2 = 180cm =1.8m
speed v = f* = (420Hz)*(1.8

ESE Homework 2
I
)
I0
=10log (30000)
=10(log3+log10000)
=10(log3+4)
=10(log3) +40
=44.771 Db (3d.p.)
1
Difference in Db = 10log(
2
130db = 10 log(
3
Db is a logarithmic way of describing a ratio (of sound pressure level, power or
intensity)
I
a) Change in

State University of New York at Stony Brook
Department of Electrical and Computer Engineering
ESE 211 Electronics Laboratory A
Lab 2: Measurement of DC voltages and currents
1. Objectives.
1) Familiarization with color-code resistor marking. Measurement o

ESE 121
Lesson 20
Transistors
Transistors are semiconductor devices that can be used to amplify
electronic signals. Similar in functionality to vacuum tube amplifiers,
transistors operate in a very different manner.
Transistors, like vacuum tubes, can als

ESE 121
Lesson 18
Loudspeakers
Transducer - A device that converts one form of energy
into another.
A loudspeaker is a transducer that converts electrical
energy into acoustic energy.
www.searspartsdirect.com
Loudspeakers
Transducer - A device that conver

ESE 121
Midterm 1 Review
Review
Homework 1 Question 1
If the peak amplitude of a sine wave is 3V (volts)
a. Determine the peak-to-peak amplitude
Peak to peak is the full excursion from the maximum (positive)
value to the minimum (negative) value. So if th

Spring 2017
ESE 211 Electronic Laboratory A
The goal of the course is to develop skills of theoretical and experimental circuit
analysis and circuit design.
Instructor: Sergey Suchalkin, Room 253 Light Engineering Bldg, [email protected]
Pre

Kirchhoff voltage and current laws. Measurement voltages and currents
Gustav Kirchhoff
1824-1887
www.nndb.com
Topological elements of a circuit
Nodes
Branches
Loops
+ =1
: + = 2
plus.math.org
convex polyhedron
Series connection
Parallel connection
V1
I
I

Lecture 3. AC analysis. Phasors.
AC (Alternating Current) signal analysis
phase
3
() = 0 cos( 0 )
I(t)=2sin(3t+1.1)
Current I(t), A
2
I0
1
amplitude
0
-1
T
-2
-3
0
1
2
3
Time, s
4
5
6
angular
frequency
Initial phase
Period T is the time required to compl

Integrating and differentiating circuits. Transient processes in passive circuits
AC currents and voltages in passive circuit elements
=
R
=
=
L
C
Transient currents and voltages in passive circuit elements
R
C
1
() =
=
0
= ()
L
1
() =
0

Spring 2017
ESE 211 Electronic Laboratory A
The goal of the course is to develop skills of theoretical and experimental circuit
analysis and circuit design.
Instructor: Sergey Suchalkin, Room 253 Light Engineering Bldg, [email protected]
Off

ESE 121
Lesson 19
Digital Audio
The term digital, when referring to audio, means
discrete. Up until now weve been discussing
analog audio and an analog signal is continuous.
Meaning that as you examine a signal as a
function of time small changes in time

ESE 121
Lesson 8
Electricity
Electroacoustics deals with the conversion of
acoustic energy to electrical energy or vise versa.
More exactly it has to do with converting pressure
into voltage.
Electricity
Once an acoustic signal is converted into an
electr

ESE 121
Lesson 1
What is Sound?
Sound Waves Travel in:
Solid
Liquid
Gas
What is Sound?
Sound waves are compression waves.
Sound waves are longitudinal.
Sound waves travel at different speeds
depending on the medium and temperature.
Sound waves create pres

ESE 121
Homework 4
Fall 2016
1. What type of filter is this (explain your answer in terms of the functionality of the
components)? Calculate the cutoff frequency.
2. Draw the gain AND phase bode plots for the circuit in question 1. Be sure to label the pa

ESE 121
Lesson 3
Waves
What is a wave?
A disturbance or oscillation (of a physical
quantity), that travels through matter or space,
accompanied by a transfer of energy. Wave
motion transfers energy from one point to another,
often with no permanent displa

Homework #3
1.
a.
b.
2.
3.
4.
a.
b.
a. Total Resistance =
b.
i. VR1 =
ii. VR2 =
5.
iii. VR3 =
a.
b. The voltage stays the same across R1, R2, and R3 they all have the same voltage applied
to them. The fact that they have different resistances mean that th

Homework #4
1. Low pass filter because the resistor and capacitor are arranged in a specific way that allows low
frequencies to pass while sending high frequencies to the ground.
2.
a.
3. High pass filter because the components are arranged specifically s

ESE 121
Homework 4
Spring 2017
1. What type of filter is this (explain your answer in terms of the functionality of the
components)? Calculate the cutoff frequency.
2. Draw the gain AND phase bode plots for the circuit in question 1. Be sure to label the

1. Describe how a PN junction works.
a. A PN junction is comprised of two semiconductors: a positively charged P-type and a
negatively charged N-type. Separately, they are simply conductors, but together on an
electronic circuit, a PN junction is created

ESE 121
Homework 5
Spring 2017
Name:
Id:
Due Thursday, May 4th.
For the following assignment you may use any source available. Your responses must be in
complete sentences, typed, and double spaced. Length is not an issue, just make sure your
answer is co