CS-EE 480 Fall 2003 1 University of Portland School of Engineering Project Brown Trout In-Line Headphone Amplifier Team Casey Hughes Jeff Sharp Jim Bosak Advisor Dr. Inan, Dr. Albright Industry Representative Mr. Howard Voorheis, John Fluke Mfg. (ret)
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CS-EE 480 Fall 2003
1
University of Portland School of Engineering
Project Brown TroutIn-Line Headphone Amplifier
TeamCasey Hughes
Jeff Sharp
Jim Bosak
AdvisorDr. Inan, Dr. Albright
Industry RepresentativeMr. Howard Voorheis, John Fluke Mfg. (ret)
CS-EE 480 Fall 2003
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University of Portland School of Engineering
Overview
• Block Diagram (Refresher)• Schematic• Milestones• Accomplishments• Plans• Issues/Concerns
CS-EE 480 Fall 2003
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University of Portland School of Engineering
Brown Trout
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University of Portland School of Engineering
Brown Trout
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University of Portland School of Engineering
Bode Plots
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University of Portland School of Engineering
Matlab Plots
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University of Portland School of Engineering
MilestonesNumber Description Original
11/25/03Previous1/27/04
Present2/24/04
1 Product Pre-Approval 9/05/03 9/05/03 9/05/03
2 Functional Spec 1.0 10/3/03 10/3/03 10/6/032 Plan Approval 11/7/03
11/23/0311/7/03 11/7/03
3 Hand Design 11/23/0311/25/03
11/23/034 Software Simulation 11/25/03 11/25/045 Design Release 12/5/03
1/19/0412/5/03 12/5/03
6 Obtain Parts 1/29/04 2/1/047 Test Parts 1/22/04
1/26/041/30/04 2/3/04
8 Battery Interface 2/5/04 2/10/049 Cable Connector Interface 1/28/04 2/5/04 2/10/04
10 Amplifier Layout Complete 2/06/04 2/25/04 2/25/04 11 TOP’s Approval 2/13/04
2/13/042/13/04 2/19/04
12 Amplifier Tested/Debugged 3/15/04 3/15/0413 Device Housing 2/13/04
2/23/043/7/04 3/15/04
14 Prototype Completion 3/23/04 3/23/04
15 Prototype Tested/Debugged 4/9/043/29/04
4/9/04 4/9/0416 Demo Design 3/29/04 3/29/04 17 Prototype Release 4/09/04 4/09/04 4/09/04
18 Founder’s Day 4/13/04 4/13/04 4/13/0419 Final Report 4/23/04 4/23/04 4/23/0420 Post Mortem 4/30/04 4/30/04 4/30/04
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University of Portland School of Engineering
Accomplishments
• Parts Received / Tested for Functionality
• Theory of Operations Approved
• Initial Amplifier Layout Complete– Passing high quality sound– Problem in final stage (high pass)
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University of Portland School of Engineering
Plans For March
• Fully Functional Amplifier
• Device Housing Completed
• Full Prototype Built– All parts brought together
• Demonstration Designed
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University of Portland School of Engineering
Issues / Concerns
• High-Pass Stage Clipping (next slide)– Half-amplification
• Passing Original Signal– Leave device plugged, but powered off– Researching switch types to compensate
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University of Portland School of Engineering
High-pass Issue
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University of Portland School of Engineering
Conclusion
• Block Diagram• Schematic• Milestones• Accomplishments• Plans• Issues/Concerns
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University of Portland School of Engineering
Questions?
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