EECS 202: Introduction to Electrical Engineering
SIGNALS, SYSTEMS, AND COMMUNICATIONS
Homework 5
Due Friday, May 6, 2016
1. Given the following sampled signal x[n], sketch a continuous-time signal x(t) for which the sampling
rate used to create x[n] is (a
EECS 202 INTRODUCTION TO ELECTRICAL ENGINEERING
LAB 2: INTRODUCTION TO INSTRUMENTATION
By Alan V. Sahakian
Revised by Arthur R. Butz
Northwestern University 2000,2001,2007,2008
Objectives:
To learn how to make simple electronic measurements
To learn abou
Lecture 3: Intro to DSP, Fourier Series
Monday, April 24, 2017
10:00 AM
Sinusoid review:
Lecture_03 Page 1
Quantization
Lecture_03 Page 2
Sampling
Quantization
Big questions:
If there are so many problems due to sampling and quantization, why bother?
Lect
Lecture 5: Fourier Series Intuition, Plotting Fourier Series
Wednesday, April 26, 2017
10:00 AM
Some more intuition about Fourier Series
Can generalize concepts about vectors to functions
Lecture_05 Page 1
Projections of vectors onto vectors
Lecture_05 Pa
EECS 202 / Spring 12 / HW7
(Due on Wed, May 16, in class)
Problem 1: (40 points)
Consider an electromagnetic wave for which the electric and magnetic fields are
described as follows:
E = zEz ( y, t )
B = xBx ( y, t )
where
= E0 Sin(ky t )
Ez ( y, t )
= B0
NAME: _
EECS 202, Solid State Engineering
FINAL EXAM
(33 points total)
_
(1) List three DIFFERENT things you can do to a semiconductor to change its conductivity (1 point each):
a)
Lecture 10: Aliasing Examples, Reconstruction
Friday, May 5, 2017
10:00 AM
First, a little review of sampling and the effect on the spectrum.
When you sample, the spectrum becomes 2pi periodic.
This is because technically, infinitely many signals can go t
MC1496, MC1496B
Balanced Modulators/
Demodulators
These devices were designed for use where the output voltage is a
product of an input voltage (signal) and a switching function (carrier).
Typical applications include suppressed carrier and amplitude
modu
Lab 2: DIP Chips and Op-Amps
Week 3
In this lab, you will learn some more fundamentals of circuit building, this time focusing on
integrated circuits (ICs). The IC we will focus on will be the LM741 Operational Amplifier (opamp). As opposed to what you wi
Lab 7: Feedback Control
Week 9
In this lab, you will construct a feedback circuit to control the position of a rod fixed to a small
DC motor. The main goal is to restore the rod to its original position after it gets displaced; you
will investigate how ce
EECS 202 Introduction to Electrical Engineering
Spring Quarter 2017
10:0010:50 am in Tech L361
Description:
Introduction to fundamental concepts and applications of electrical engineering
(EE). Topics include: circuit analysis from direct-current (dc) res
EECS 202: Introduction to Electrical Engineering
SIGNALS, SYSTEMS, AND COMMUNICATIONS
Homework 6
Due Wednesday, May 09, 2012
Problem 1
An audio signal, whose frequencies range from 0.2kHz to 1.7kHz, is used to amplitude-modulate a 200kHz
carrier. Sketch t
Lab 6: Amplitude Modulation
Week 8
In this lab, you will make an AM radio transmitter and test it by sending out signals to a
receiver.
1
Background
AM, or amplitude modulation, is one of several modulation techniques used to transmit information via radi
Lecture 11: Reconstruction, Quantization
Monday, May 8, 2017
10:00 AM
Signal reconstruction
Lecture_11 Page 1
Notes about reconstruction frequency
MATLAB Demo
reconstruction_rate.m
Lecture_11 Page 2
General reconstruction
In general, no analytical expres
Lecture 13: Analog Communications
Wednesday, May 10, 2017
10:00 AM
Basic idea
Lecture_13 Page 1
Analog modulation
Lecture_13 Page 2
AM
Idea:
Modulation
Lecture_13 Page 3
Some more illustration of modulation
Lecture_13 Page 4
Demodulation
MATLAB Demos
mul
Lab 5: Voice-Based Lock
Week 7
In this lab, you will make a voice-based locking mechanism using MATLAB. Please use MATLAB 2014b. Make sure that all of the files for this lab are in the same folder.
1
Background
Data acquisition is a very useful tool in MA
Lecture 2: Introduction to Digital Signal Processing
Friday, April 21, 2017
10:00 AM
Examples
Phased array:
http:/www.mathworks.com/videos/phased-array-system-toolboxoverview-61876.html
http:/en.wikipedia.org/wiki/Phased_array
Iron Dome:
http:/youtu.
Lecture 4: Fourier Series
Tuesday, April 25, 2017
10:00 AM
Can modify amplitude and phase of such signals to model more complicated signals
Lecture_04 Page 1
Why negative components?
Lecture_04 Page 2
Why is the summation from -N to N?
Lecture_04 Page 3
B
Lecture 9: Aliasing, Filtering, Aliasing Examples
Wednesday, May 3, 2017
10:00 AM
Aliasing
Lecture_09 Page 1
What happens if we keep increasing the frequency of a sinusoid
while keeping the sampling rate constant?
MATLAB Demos
con2dis GUI
sound_folding.
function varargout = digital_modulation(varargin)
%DIGITAL_MODULATION
%Author: Diego Orlando Barragn Guerrero
[email protected]
%Loja (Ecuador)
%For more information, visit: www.matpic.com
%Last Modified by GUIDE v2.5 25-Jan-2007 22:07:45
% Begin i
Lab 8: Solar Tracking
Week 10
In this lab, you will create a solar tracker.
1
Background
A solar tracker is a device that orients a payload towards the sun. In this lab the payload is photovoltaic silicon solar panels.
2
Construction of Solar Tracker
2.1
Lecture 6: Fourier Series Plots
Friday, April 28, 2017
10:00 AM
Example
Lecture_06 Page 1
In general
Lecture_06 Page 2
Aside: What do components in the Fourier Series actually sum up to?
Positive component:
Negative component:
Positive plus negative:
Lect