Skip to main content

A Delta-Sigma Modulator with UPWM Quantizer for Digital Audio Class-D Amplifier

Citations of this article
Mendeley users who have this article in their library.
Get full text


In this paper, a delta-sigma modulator (DSM) with uniform pulse-width modulation (UPWM) quantizer for digital audio class-D power amplifier is presented. A pole-moving approach for Inverse Chebyshev filters is proposed to stabilize the UPWM modulator as well as improve its performance. The characteristics of the saw-Tooth carrier for UPWM quantizer is explored to reduce the output switching rate and the power loss in class-D amplifier in the pulse-density modulation (PDM) case. In the presented single-loop sixth-order UPWM modulator with the ameliorated saw-Tooth carrier, an SNDR of 120 dB within 20-kHz bandwidth can be achieved under full-scale signal input. With the proposed schemes, the highest transfer efficiency of 1 for digital class-D amplifier can also be obtained.




Kuo, C. H., & Liou, Y. J. (2019). A Delta-Sigma Modulator with UPWM Quantizer for Digital Audio Class-D Amplifier. In Proceedings of the 26th International Conference “Mixed Design of Integrated Circuits and Systems”, MIXDES 2019 (pp. 293–297). Institute of Electrical and Electronics Engineers Inc.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free