The implementation of a transient DC-link boost based digital amplifier for eliminating pulse-dropping distortion

Y. C. Chiu; B. Zhou; Henry S.H. Chung; W. H. Lau

doi:10.1109/ISCAS.2004.1329945

The implementation of a transient DC-link boost based digital amplifier for eliminating pulse-dropping distortion

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 22_Publication in policy or professional journal

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1 Scopus Citations

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Author(s)

Y. C. Chiu
B. Zhou
Henry S.H. Chung
W. H. Lau

Related Research Unit(s)

Department of Electrical Engineering

Detail(s)

Original language	English
Journal / Publication	Proceedings - IEEE International Symposium on Circuits and Systems
Volume	5
Publication status	Published - 2004

Conference

Title	2004 IEEE International Symposium on Cirquits and Systems - Proceedings
Place	Canada
City	Vancouver, BC
Period	23 - 26 May 2004

Link(s)

DOI	DOI https://doi.org/10.1109/ISCAS.2004.1329945 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-4344682625&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(cfbd7995-616a-44c1-b8b8-7894f07ea5fc).html

Abstract

A transient dc-link boost technique for avoiding pulse dropping in digital amplifiers is presented. The concept is based on increasing the dc link voltage and reducing the modulation index momentarily, when the modulating signal is large. Apart from effectively reducing harmonic distortion at the output, the proposed method can also widen the dynamic modulation range and thus reduce the required supply voltage. A 10W prototype with an H-bridge inverter has been built. Some pulses are artificially dropped in the gate signals to simulate the pulse-dropping effect. The inverter output harmonic spectra with and without the transient boost have been compared.