Common-Mode Noise Reduction by Current Cancellation in Balanced Buck-Boost Switching Converter

Masahito Shoyama, Masashi Ohba, Tamotsu Ninomiya

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Because conventional switching converters are usually using unbalanced circuit topologies, parasitic capacitance between the drain of an MOS-FET and the frame ground through its heat sink may generate the common-mode conducted noise. We proposed a concept of balanced switching converter circuit, which is an effective way to reduce the common-mode conducted noise of a switching converter by current cancellation. In this paper, the path of the noise current in a balanced buck-boost converter circuit is investigated using a current probe. By measuring current waveforms and frequency spectra of the parasitic capacitances and the frame ground line, the mechanism of the common-mode noise reduction by current cancellation is clarified.

Original languageEnglish
Pages (from-to)499-504
Number of pages6
JournalINTELEC, International Telecommunications Energy Conference (Proceedings)
Publication statusPublished - 2003
EventThe 25th International Telecommunications Energy Conference - Yokohama, Japan
Duration: Oct 19 2003Oct 23 2003

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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