Title
High Performance Digital-input Class-D Amplifier
Author
Wu, Keyu (TU Delft Electrical Engineering, Mathematics and Computer Science)
Contributor
Fan, Q. (mentor)
Alavi, S.M. (graduation committee) 
Berkhout, Marco (graduation committee)
Degree granting institution
Delft University of Technology
Programme
Electrical Engineering | Microelectronics
Date
2023-11-30
Abstract
Class-D amplifiers have gained popularity for their high-power efficiency, exceeding 90%. Among them, digital-input Class-D amplifiers stand out due to their superior integration and increased immunity to electromagnetic interference (EMI). This project introduces a high-performance digital-input Class-D amplifier, aiming for a dynamic range larger than 130 dB while maintaining total harmonic distortion (THD) at approximately -110 dB.
It employs a capacitive digital-to-analog converter (CDAC) to minimize noise. Mismatch in the CDAC is addressed through mismatch shaping techniques. Additionally, an open-loop transconductance stage is incorporated into the loop filter, enhancing dynamic range and striving for optimal performance. Extra paths are introduced in the loop filter to guarantee that amplifier swings are maintained within the designated range.
Subject
Class-D amplifier
capacitive digital-to-analog converter,
mismatch shaping
loop filter
dynamic range (DR)
To reference this document use:
http://resolver.tudelft.nl/uuid:9779c3e3-6b31-4582-8bd3-39ff2d81be91
Embargo date
2025-11-30
Part of collection
Student theses
Document type
master thesis
Rights
© 2023 Keyu Wu