1. 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

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

3. 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

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

5. Basic Block Diagram

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

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

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

9. Testing Multisim Circuit building and testing THD calculations
Spectrum Analyzer

10. Budget

11. Timeline

12. Questions?

13. Picture Sources