A 3rd order 1.5-bit continuous-time (CT) Sigma-Delta (ΣΔ) modulator optimized for Class D audio power amplifier

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents a 3rd order 1.5-bit ΣΔ modulator with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High level simulations of the modulator show that it has a maximum SNDR value of 82.4 dB and a dynamic range (DR) of 76 dB, for a signal bandwidth of 18 kHz and a sampling frequency of 1.2 MHz. The use of a full-bridge output stage allows 1.5-bit quantization.
Original languageUnknown
Title of host publication-
Pages531 - 535
Publication statusPublished - 1 Jan 2010
EventMixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference -
Duration: 1 Jan 2010 → …

Conference

ConferenceMixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference
Period1/01/10 → …

Cite this