Circuits Lab 2 Mesh and Nodal Analysis
Prof. Zachman BME3071C
Introduction
In Lab 2, students designed a three-mesh circuit in order to learn about nodal and mesh
analysis. The objective of the lab was for students to learn about power consumption, and ho
Circuits Lab 3 Thevenin Equivalence and Power
Prof. Zachman BME3071C
Introduction
The objective of Lab 3 was to design a circuit that delivered 0.085 to 0.15 Watts to the
load resistor of a value of 100 with at least three resistors used for an equivalent
Circuits Lab 1 Exploring Resistance, Voltage & Current
Prof. Zachman BME3071C
Introduction
In the first lab of the semester, students examined the relationships within circuits using
resistors. Relationships in circuits with resistors can be measured in r
Sensing and
Measureme
n
t
Lecture 6
1.23.17
Class Objectives
0 Understand principles of circuit elements:
0 Resistors
0 Capacitors
0 Inductors
0 Remember which ones are frequency dependent
0 Become more comfortable with manipulating complex
numbers
0 Calc
Sensing and
Measureme
n
t
Lecture 6
1.23.17
Class Objectives
0 Understand principles of circuit elements:
0 Resistors
0 Capacitors
0 Inductors
0 Remember which ones are frequency dependent
0 Become more comfortable with manipulating complex
numbers
0 Calc
CHEMICAL SENSORS
HOW DO WE MEASURE THE ELECTRIC
POTENTIAL OF A CELL?
+
_
Membrane
Potential, Vm
(mV)
External Bathing
Medium
Axon
Resting potential -79mV in human neuro
Neurons and muscles are excitable
Movement
Artifact
0
-80
Time
WHY IS THE RESTING POTE
Filters 2.1.17
Sensing and Measurement
If Vin is a direct current (DC) source, what is Vout?
I
Zcap=
DC current means =0
Zcap=
I=0
Vout=0
If Vin is 100*sin(0t), what is Vout?
1.0F
I
1.0k
Zcap=
=0
Zcap=
I=0
Vout=0 STILL ZERO
If Vin is 100*sin(At) at a freq
Lecture 3.3.17-3.8.17
Creating Light
3) Photoemissive and photojunctions:
LEDs:
Wavelength of light dependent on band gap of semiconductor (ie the energy
required to release a valence electron from to become a conduction electron)
GaP LED is electrolu
Digital Signal
Processing and Basic
Circuit Elements
Dr. Angela Zachman
BME 3020 Sensing and Measurement
1.18.2017-1.20.2017
What is a Digital Signal?
If our signal, S(t):
1. exists for all times (all values of t) from the time of its beginning
2. exists
Filtering 2.6.17
Sensing and Measurement
What should you do if you have low frequency and high frequency
noise (and your signal is in between these frequencies, but not
overlapping)
A.
B.
C.
D.
E.
Hope and pray
You cant do anything
Use a high pass filter
Lecture 2.10.17
Sensing and Measurement
Electrode Design
Large difference in surface area between these two types of electrodes
How do you get an electrical signal from the body and into the electrode?
Must overcome input impedance!
Impedance into elec
Lab 1: Intro to LabVIEW and
Signal Processing
GRAPHICAL PROGRAMMING
FOR ENGINEERS AND SCIENT
LabVIEW Graphical Development System
Graphical programming environment
Compiles code for multiple OS and devices
Useful in a broad range of applications
LabVIE
Sensing Bioelectric Events
Sensing and Measurement
February 8th, 2017
Test 1!
Friday (2/17) of next week
We will cover new material next Wednesday
which wont be on this test, but will be on the
next test
On Monday we will review HWs and review for
the
Signal Analysis
Sensing and Measurement
Dr. Angela Zachman
1/11/17
What is a signal? What is an event?
An event can happen once, without any context of it in the place of anything
else.
A signal is multiple events with inferred relationship between even
Lecture 3: Signal Analysis
Time to Frequency, decibels, and SNR
BME 3020 Sensing and Measurement
Dr. Angela Zachman
1/13/17
How do we convert time based
signals to frequency?
Slow signal
S(t)
S(f)
Fast signal
S(t)
S(f)
In frequency plots, there is a maxi
Microfluidics and
Micropatternings
Announcements
Turn in Homework #5
Homework #6 posted today, due Friday, Dec4th
Group Presentation Schedule
Wednesday Dec 2
EKG: Lauren, Sadie, Kim Ashlee
Temperature Controller: Monica, Dante, Stephen, Cindy
GSR: Ni
Integrated Circuits and
Bio-MEMS
1
Whats in an op-amp? How do they make it?
Integrated circuits!
Resistors
Capacitors
Transistors
Whats in an integrated circuit?
https:/www.youtube.com/watch?v=z47Gv2cdFtA
Integrated Circuit
Advantages
While a very high st
Lecture 3: Signal Analysis
Time to Frequency, decibels, and SNR
BME 3020 Sensing and Measurement
Dr. Angela Zachman
1/13/17
How do we convert time based
signals to frequency?
Slow signal
S(t)
S(f)
Fast signal
S(t)
S(f)
In frequency plots, there is a maxi
Getting to know each other, the
course, and what is Sensing and
Measurement anyways?
Lecture 1 January 9th, 2017
BME 3020 Sensing and Measurement
Angela Zachman, Ph.D.
On a piece of paper write:
Name (and what you prefer to be called if different)
Favorit
Overview
08/23/16
signal variation in some quantity (amplitude/energy/number) carrying information.
Represented as continuous 1D function or discrete (sampled) function !
information the data of interest, as defined by the user.
Discrete function
Image Processing
10/25/16
Discrete (sampled) images
! , ! = real number at each position ! , ! for 1 , 1
Grayscale images
Grayscale values fall between 0 1 (float) or 0 255 (integer) for 8-bit depth
display methods (the vast majority). In both
Image Processing
11/10/16
Edge detection, sharpening images
!"
! !
Spatial derivitives are the key: , 0 , !" , 0 , ! ! , 0
In practice, for an image , sampled with step sizes , , use the second-order
!"
accurate finite-difference approximation to
Frequency Analysis
9/1/16
Fourier analysis represents a signal as a combination of sinusoidal components
Useful for altering/operating on/filtering a signal in the frequency domain
General real form:
!
cos + = Re !(!"!) where = 2 = !
= + = ! =
Diffraction Tomography
11/22/16
Reconstruct tissue medium from measuring scattered field
can use ultrasound, microwave, or optical imaging
Incident wave !"# = !"!
!
=
1
!
sound speed !
is unit vector in incident-wave propagation direction
i
Quiz 6: Biodegradation
Biodegradable Polymers:
Synergies of tissue growth and material degradation
o Material Degradation
Do not require a second surgery for removal
Avoid Stress Shielding
Bone remolds itself in response to forces it encounters. Result
Quiz 2 - Tissues
1. Tissues:
1. Types (4 major types)
a. Epithelial
Primarily used for protection
Very little ECM between cells
Endothelium specialized epithelial cells in blood vessels
b. Connective
Primarily used for support
Originates from embryon
Quiz 3: Sterilization
1. Sterilization:
1. Types of different methods of disinfection: pros and cons
a. Physical the most important as they can be relied on to ensure the
sterilization of articles used in the treatment of patients
Thermal heat or steam