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Class-D Garage Band Amplifier

Class-D Garage Band Amplifier. Team: Aaron Danielson, Robert Mann, Randall Newcomb, Scott Russell Sponsor: Nigel Thompson. Overview. The purpose of the class-D garage band amplifier Requirements and stretch goals System block diagram Task breakdown Project schedule Budget Summary.

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Class-D Garage Band Amplifier

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  1. Class-D Garage Band Amplifier Team: Aaron Danielson, Robert Mann, Randall Newcomb, Scott Russell Sponsor: Nigel Thompson

  2. Overview • The purpose of the class-D garage band amplifier • Requirements and stretch goals • System block diagram • Task breakdown • Project schedule • Budget • Summary

  3. Purpose

  4. Requirements • The output stage will be a PWM H-bridge amplifier • High quality audio • Low cost • High efficiency • The power supply will be low cost • The initial design will output 10W RMS • … Stretch Goals • An enclosure will be constructed to house the amplifier, FPGA and speaker • A more powerful amplifier will be implemented

  5. System Concept Images from Google Image

  6. System Block Diagram

  7. Description of Major Tasks • Design a Top Level Testbench • Contains all the key modules that connect the DSP and PWM. • Implement microprocessor. • Digital Signal Processor • Design 2 filters – one each for bass & treble. • Interface with LCD & rotary dial for user input. • H-Bridge Driver • Design Driver to control H-bridge IC. • Drive all 4 MOSFETs within the timing constraints. • Amplifier • Design an H-bridge. • Implement and test the amplifier • Speaker Enclosure

  8. Bitrate & Sample Rate Comparison – CD Quality

  9. Bitrate & Sample Rate Comparison – Low Sample Rate

  10. Bitrate & Sample Rate Comparison – Low Bit Depth

  11. Bitrate & Sample Rate Comparison – A Good Compromise

  12. Budget Amplifier Components $50.00 Power Supply Components $50.00 Item 4 $50.00 Item 5 (donation) $5,000.00 Total$5,095.00 Total with donations $95.00

  13. Project Schedule

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