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

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

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

Introduction September, 2006 University of Portland School of Engineering

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

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

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

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

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

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

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