Hi Richard – Where did you find the circuit you posted? There are three different models used for ESD - the human body model (HBM) the charge device model (CDM), and the machine model (MM) and … the circuit you posted doesn’t look like anything I have seen!! It could be a “fitted” circuit that is: a circuit derived from a waveform?
Thanks! Charles Grasso W: 303-706-5467 From: Richard Georgerian [mailto:richa...@mesanetworks.net] Sent: Sunday, February 17, 2019 9:10 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] ESD network schematic This message originated outside of DISH and was sent by: owner-emc-p...@listserv.ieee.org<mailto:owner-emc-p...@listserv.ieee.org> Greeting colleagues, I am trying to find out what standard or document the below ESD discharge network/ESD gun circuit comes from. It does not appear to come from either IEC 61000-4-2 or the MIL Standard. The Rs and Cs are the discharge network for a specific ESD waveform. The LS looks like the internal inductance of the ESD gun; the CH looks like the capacitance (maybe the parasitic capacitance of the ESD gun). The LH looks like the inductance of the ESD tip and the RH looks like the limiting resistor that is part of the ESD tip circuit. I cannot put a date as to when this schematic was made, so it could be something recent or from many years ago. [cid:image001.png@01D4C766.FC66BC90] Thank-you, Richard Georgerian Applications Engineer - ---------------------------------------------------------------- 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<mailto: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://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald <dhe...@gmail.com<mailto: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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
