Download Slide 1 - Electrical Engineering and Computer Science

Electrical Engineering and Computer Science
EECS373 - Design of Microprocessor-Based Systems
Put Your Title Here
Name1, Name2, Name3
{name1, name2, name3}@umich.edu
Introduction: Write some title for intro
• Plethora
• Phone
of
Jack:
mobile
Literally
a
phone
interfaces
“plug-and-play”
interface
Some other title format
Problem Description: Describe the problem in a few words
• DC not possible to generate from
headset
• Direct rectification incurs significant power
losses
• Active rectification requires supply/gate
drive voltages
Active rectifier
Proposed Solution: How did you solve the problem?
Some title
• Describe what you did. Add Pictures!
Communication & Sensors
• Hardware accelerated Soft-Modem on MCU
• Manchester encoded digital communication • Building out the square-inch
8.82 kbps at 3.1x10-5 BER
sensor ecosystem
• Impact on Phone Battery: 200 mW
Conclusion
With the basics of powering external devices and communicating with them now in place, it will soon be
possible to plug a small circuit board into almost any existing mobile phone, power an external sensor (e.g.
EKG, PulseOx, etc.), bias it with a voltage, read its analog output back, perform some sophisticated filtering,
and present an instant result. In short, a parasitically-powered analog expansion interface for the mobile phone
will enable many new applications that are either impossible or infeasible with today’s technology.
1
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