Noise Reduction Mechanism in Common-Source Type Active-Clamped DC-DC Converters

Ge Li, Masahito Shoyama, Tamotsu Ninomiya

Research output: Contribution to journalArticlepeer-review

Abstract

We have pointed out that the common-source type active-clamp converter has a good feature of common-mode noise reduction and have shown its low noise characteristics. This paper analyzes the noise reduction mechanism in the common-source type active-clamp converter in detail. By measuring the near-field magnetic radiated noise, we examine the noise current path on the converter circuit board at some frequencies in problem. From this analysis we derive a high-frequency equivalent circuit for conducted noise current. The effect of stray capacitances on the near-field magnetic radiated noise frequencies is examined to confirm the validity of the high-frequency equivalent circuit. It is shown that the near-field magnetic radiated noise is reduced by shrinking the noise current loop.

Original languageEnglish
Pages (from-to)505-509
Number of pages5
JournalUnknown Journal
Publication statusPublished - 2003

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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