{"id":392817,"date":"2024-11-05T16:04:44","date_gmt":"2024-11-05T16:04:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-of-cascaded-resistors-and-voltage-drops\/"},"modified":"2024-11-05T16:04:44","modified_gmt":"2024-11-05T16:04:44","slug":"simulation-of-cascaded-resistors-and-voltage-drops","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-of-cascaded-resistors-and-voltage-drops\/","title":{"rendered":"Simulation of Cascaded Resistors and Voltage Drops"},"content":{"rendered":"<p>&lt;p class=&#8221;MsoNormal&#8221;&gt;I am attempting a DC IR analysis using Ansys SIwave where I have multiple stages of resistors. Therefore, I have created a simple PCB for evaluation purposes. In the circuit, I have a voltage source, multiple resistors in series until it reaches an LED. For simplicity terms, I have created a dumbed down version of the setup.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730822042-mceclip0.png\" \/>&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;I have set the voltage source on R1 and the LED as a current source.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730822081-mceclip1.png\" \/>&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730822218-mceclip2.png\" \/>&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;I am not able to simulate successfully the correct voltage levels across different the resistors.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;I am attaching the set configurations and the obtained results.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;Can someone kindly guide me on the proper way to set this up?&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221; style=&#8221;text-align: center;&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730822323-mceclip3.png\" \/>&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221; style=&#8221;text-align: center;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730822334-mceclip4.png\" \/>&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730822345-mceclip5.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392817","topic","type-topic","status-publish","hentry","topic-tag-ansys-thermal-1","topic-tag-dcirdropsimulationvoltagedrop-1","topic-tag-LED-1","topic-tag-resistor-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am attempting a DC IR analysis using Ansys SIwave where I have multiple stages of resistors. 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