{"id":42676,"date":"2020-04-10T22:17:19","date_gmt":"2020-04-10T22:17:19","guid":{"rendered":"\/forum\/forums\/topic\/extracting-parasitics-out-of-a-pcb-layout-or-cut-out-of-the-board\/"},"modified":"2020-04-10T22:17:19","modified_gmt":"2020-04-10T22:17:19","slug":"extracting-parasitics-out-of-a-pcb-layout-or-cut-out-of-the-board","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/extracting-parasitics-out-of-a-pcb-layout-or-cut-out-of-the-board\/","title":{"rendered":"Extracting parasitics out of a PCB layout or cut out of the board"},"content":{"rendered":"<p>Hi all,<\/p>\n<p><\/p>\n<p>I&#8217;m new in using Ansys and going to extract <strong>parasitic elements from a cut out of a PCB layout<\/strong>.<\/p>\n<p><\/p>\n<p>I&#8217;ve imported my PCB layout from <strong>Cadence PCB editor<\/strong> into <strong>SIWave<\/strong> and trying to make a cut out of my board into <strong>Q3D extractor<\/strong> and then extract the parasitic of the desired traces.<\/p>\n<p><\/p>\n<p>First, While making a cut out of my board, sometimes I am not able to <strong>draw geometry<\/strong> (draw a polygon extent), before importing into Q3D. It seems that this is deactivated for some reason.&nbsp;However, I was able to do that before and I have the license on my laptop.<\/p>\n<p><\/p>\n<p>Second, After importing into Q3D extractor, since it takes a long time for Ansys to make the mesh and solve the problem, I&#8217;m going to cut the board to small pieces and make the simulation locally. I know that I need to assign the source and sink before running the simulation, but I do not know when I make a cut out of the PCB board, where it should be assigned as a source and a sink. I mean basically, the power is coming from or out of&nbsp;a connector. but, it seems that I&#8217;m not able to assign the source into a pin. Rather, I should assign the source or sink into a sheet or &#8230; .&nbsp;<\/p>\n<p><\/p>\n<p>Third, After completing the simulation, how can I find the RL parasitic for a specific trace such as ground. considering my ground trace is a long and thick trace coming from the left side to the right side of the board, how can I specify for the software to find parasitic RL of&nbsp;which part of the trace is the target.<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>I really appreciate your help cause I&#8217;ve stuck for days to make this simulation<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-42676","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["14856"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1237"],"_bbp_subscription":["249734"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["42676"],"_bbp_forum_id":["27793"],"_bbp_engagement":["175572"],"_bbp_voice_count":["1"],"_bbp_reply_count":["0"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["42676"],"_bbp_last_active_time":["2020-04-10 22:17:19"]},"test":"marsha"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/42676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/42676\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=42676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}