1. Project Sublimity Audio Stereo Class-D Audio Amplifier
Team
Joe Baird
Luke Raynor
Aaron Taylor
Advisor
Dr. Osterberg
Industry Representative
Mike Desmith (Intel)
September, 2006
University of Portland School of Engineering

2. Overview Introduction Scorecard Additional Accomplishments Plans
Issues/Concerns
Conclusions
September, 2006
University of Portland School of Engineering

3. Introduction Stereo input, 2.1 Output
Much more efficient that typical amplifiers
Switching rather than linear
Using dsPIC to do DSP filtering
September, 2006
University of Portland School of Engineering

4. Introduction September, 2006
University of Portland School of Engineering

5. Scorecard Develop idea for project
Put together Functional Specifications
Made contact with industry rep for guidance
September, 2006
University of Portland School of Engineering

6. Other accomplishments
Some successful SPICE runs
Project Plan 0.9 completed
Heard back from Logitech
September, 2006
University of Portland School of Engineering

7. Plans Define more specific needs for parts
Define details of feedback loop, DSP
Run more PSPICE simulations
Work on DSP pic code
Output filters designed
September, 2006
University of Portland School of Engineering

8. Plans continued… September, 2006
University of Portland School of Engineering

9. Unit Testing Completed
Milestones
Number
Description
Original
9/25/06
Previous
Present
10/30/06 1
Product Approval
10/22/06 2
Plan Approval
11/10/06 3
Circuit Diagram
12/1/06 4
Design Release
12/08/06 5
TOP’s Approval
02/23/07 6
Unit Testing Completed
3/23/07 7
Prototype Release
04/13/07 8
Founder’s Day
04/16/07 9
Final Report
04/27/07 10
Party with Stereo
4/27/07
September, 2006
University of Portland School of Engineering

10. Concerns/Issues Only 12-bit ADC Switching Noise
Use separate 16-bit ADC
Switching Noise
Design better filter
Putting 10+ amps through proto-board
Feedback loop
Use Full Bridge
September, 2006
University of Portland School of Engineering

11. Conclusions We appear to be on schedule
We are making contacts in the industry for life after UP
We are excited to build an amp so we can have our party in the spring.
Does anyone have a question?
September, 2006
University of Portland School of Engineering