DSP Modulated Class D Audio Amplifier

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

English Program Analysis at Hong Kong University of Science and Technology

This project, completed for the Language Centre of Hong Kong University of Science and Technology, aims to improve the English language courses for first-year students. By interviewing teachers, surveying current students, and conducting focus groups with previous students, we have collected three separate opinions on the current students' English language needs and the ability of the course materials to meet them. We recommended changes, based on our evaluation of these opinions, which should improve the first-year English courses