Greetings And just when you thought it was safe to go back in the water..!!
Q: Has this august forum heard of/seen/used a filter combo technique to tie the connector shield to the circuit ground successfully? ######### ILLUMINATION ############# ############### My question has to do with USB dongles and the connection of the cable shield to circuit ground. I am running across a lot of posts recommending NOT having a low impedance connection from the shield to the circuit ground at the dongle connector : rather the shield is kept separate (at least AC wise) from the circuit ground using a ferrite/cap or resistor/cap combo. I have also read that the industry convention now is to tie the shield ground and the circuit ground at the host only and "float" the peripheral connector using the filter combo previously stated. I have not used this EMI suppression technique but I find it simultaneously intriguing and counter intuitive. Q: Has this august forum heard of/seen/used this technique successfully? TL/DR: Found new USB grounding technique, am suspicious of it, asking for the forums help. TIA ***************** ************** ************* Summary of techniques can be found here: [https://forum.allaboutcircuits.com/threads/usb-device-cable-shield-connection-grounding-it-or-not.58811/] - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
