Randomized carrier PWM with exponential frequency mapping

Alfonso Carlosena, Wing Yee Chu, Bertan Bakkaloglu, Sayfe Kiaei

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

Abstract

Pulse Width Modulation (PWM) and Sigma Delta Modulation (SDM) have been used in several high linearity, high accuracy power delivery applications such as DC-DC power converters, audio and RF power amplifiers as well as in data converters. In this paper we present a particular class of Carrier Frequency Modulated PWM (CFMPWM), which spreads the tonal content of regular PWM uniformly in frequency and reduces the baseband noise with respect to SDM by up to 15 dB. The new modulation scheme preserves at the same time the high efficiency properties of PWM. An approximate method to estimate the spectrum of CFMPWM signals with both deterministic and random modulation is also presented. Simulation results and experimental data are reported to analyze the spectral spreading properties of the proposed CFMPWM scheme.

Original languageEnglish (US)
Title of host publicationISCAS 2006
Subtitle of host publication2006 IEEE International Symposium on Circuits and Systems, Proceedings
Pages5059-5062
Number of pages4
StatePublished - Dec 1 2006
EventISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems - Kos, Greece
Duration: May 21 2006May 24 2006

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Other

OtherISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
CountryGreece
CityKos
Period5/21/065/24/06

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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