Project Sublimity Audio Stereo Class-D Audio Amplifier

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

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

4. Introduction University of Portland School of Engineering

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

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

8. Plans continued… University of Portland School of Engineering

9. Milestones University of Portland School of Engineering

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