Class D Amplifier with Digital Preamp

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Presentation transcript:

Class D Amplifier with Digital Preamp ECE 791/792 Oral Proposal Team Members: Jared Ogden, Sean Laman Project Advisor: Prof. Richard Messner Current Date: November 2, 2012 Project Completion Date: May 2013

Topics Problem Definition Reasons Block Diagram Breakdown Design Testing Budget Timeline Questions

Problem Definition Create a class-D digital amplifier with a digital preamp Dual Channel – 75 Watts each into 8 Ohms Full Bridge Topology Efficiency of ~90%, THD of 1% or less Implementation of HEXFET Transistors Complete project within budget

Reasons Increase understanding of audio amplifiers Interest Learning more about analog to digital conversion

Basic Block Diagram

Breakdown Analog to Digital preamp using a triangle pulse generator Utilizing full-bridge in place of half-bridge with feedback

Design Overview Visual shows a detailed block diagram of the amplifier with A/D conversion

Design Overview Faceplate Design Includes: Bass and treble Volume Power button with LED

Testing Multisim Circuit building and testing THD calculations Spectrum Analyzer

Budget

Timeline

Questions?

Picture Sources http://www.maximintegrated.com/images/appnotes/3977/3977Fig02.gif http://www.irf.com/product-info/audio/classdtutorial.pdf http://4.bp.blogspot.com/-DTQXWYipRvw/T5jkOUfYS8I/AAAAAAAAAAs/jLJic-IwWJY/s1600/blockdiagram.bmp

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