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Title: Techniques for input ripple current cancellation : classification and implementation
Authors: Poon, NK
Liu, JCP
Tse, CKM 
Pong, BMH
Keywords: Electromagnetic interference
Ripple current cancellation
Switching regulators
Issue Date: Nov-2000
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on power electronics, Nov. 2000, v. 15, no. 6, p. 1144-1152 How to cite?
Journal: IEEE transactions on power electronics 
Abstract: Switching power supplies, due to their high-frequency switching operation, draw a substantial amount of input ripple current. Such ripple current manifests itself as electromagnetic interference (EMI). Active and passive ripple cancellation methods have been proposed in the past. 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. The initial focus is on differential-mode noise cancellation, but the basic technique can be applied equally to cancelling common-mode noise. The classification provides a clear guideline for synthesizing practical cancellation circuits. Both active and passive implementation examples are given and experimentally demonstrated.
ISSN: 0885-8993
EISSN: 1941-0107
DOI: 10.1109/63.892829
Rights: © 2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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