Techniques for input ripple current cancellation: Classification and implementation

N. K. Poon, J. C P Liu, Chi Kong Tse, M. H. Pong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Switching power supplies, due to their high-frequency switching operation, draw a substantial amount of input ripple current, which manifests as undesirable electromagnetic interference (EMI). This paper discusses the cancellation methods, and classifies the basic circuit configurations for ripple current cancellation. The basis of discussion is a `nullification' process, which can be described effectively in terms of the ideal circuit element nullor. Both active and passive implementation examples are given and experimentally demonstrated.
Original languageEnglish
Title of host publicationPESC Record - IEEE Annual Power Electronics Specialists Conference
Number of pages6
Publication statusPublished - 1 Dec 2000
Externally publishedYes
Event2000 IEEE 31st Annual Power Electronics Specialists Conference (PESC) - Galway, United Kingdom
Duration: 1 Dec 2000 → …
Conference number: 31


Conference2000 IEEE 31st Annual Power Electronics Specialists Conference (PESC)
Country/TerritoryUnited Kingdom
Period1/12/00 → …

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this