Implementation of a full digital amplifier using feedback quantization

Jwu-Sheng Hu*, Keng Yuan Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations


An audio-band full digital amplifier is presented using a low-pass sigma-delta modulator. The modulator is a nonlinear feedback system which outputs a sequence to control the power MOSFET. By rigorous analysis of the stability and performance, an effective design method can be derived. This paper presents the modulator design using both 1- and 1.5-bit quantizer. The designs are successfully implemented by using an FPGA and other discrete elements. Experimental results and comparison are shown by driving the loudspeaker load.

Original languageEnglish
Title of host publicationProceedings of the 2006 American Control Conference
Number of pages6
StatePublished - 1 Dec 2006
Event2006 American Control Conference - Minneapolis, MN, United States
Duration: 14 Jun 200616 Jun 2006

Publication series

NameProceedings of the American Control Conference
ISSN (Print)0743-1619


Conference2006 American Control Conference
CountryUnited States
CityMinneapolis, MN

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