Mark Nave of EMC Services patented a DMRN based totally on resistors no transformers - trade-named LISN MATE, back in the late 1980s. If memory serves, there was a three phase variant as well as the more common three-port devices that connected to a pair of LISNs and the EMI receiver.
Later on he also designed a CMRN, trade-named LISN MARK, which was based on resistors and a transformer with flat response from 10 kHz to 30 MHz, again if memory serves. EMC Compliance has samples of each, as well as a switchable cm/dm injection network based on the same principles. Today, FCC (Fischer Custom Communications) offers a device based on the original EMC Services technology. Ken Javor Phone: (256) 650-5261 From: "ralph.mcdiar...@schneider-electric.com" <ralph.mcdiar...@schneider-electric.com> Date: Wed, 13 Jun 2012 10:05:35 -0700 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: DMRN for 4 wires (EMC) A DMRN (Differential-Mode Reject Network) works well for 2-wires, but has anyone tried for 4 wires? I suppose a common-mode transformer with a bandwidth up to 30MHz would do. Any suggestions from the RF gurus in the group? ____________________________________________________________________________ ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
