The goal of this project was to create an 80W, 95% efficient Class D audio amplifier with less than 0.5% harmonic distortion and greater than 100 dB zero-input signal to noise ratio that accepts digital inputs. The amplifier that was built comprised of a three-state digital modulator, an H-bridge amplifier, and a passive filter and was capable of accepting both digital and analog audio inputs by means of the SPDIF protocol and an ADC. To allow the modulator design to be quickly altered, it was implemented on a DSP. Because the modulator could be easily changed, several different modulation schemes were simulated, designed and tested in order to achieve optimal audio quality and efficiency results.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Bellamine, Wadii
• Collins, Jameson John
• Ropi, Craig

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-041409-210039

Advisor

• Klein, Andrew G.

Year

• 2009

Sponsor

• NECAMSID

Date created

• 2009-04-14

Resource type

• Major Qualifying Project

Major

• Electrical & Computer Engineering

Rights statement

• In Copyright

Last modified

• 2020-12-03