DesignSpark Circuit Simulator is the latest edition to DesignSpark’s design tools portfolio. Powered by Siemens PartQuest Explore, DesignSpark Circuit Simulator is a cloud-based design, modeling, simulation, and analysis environment.
You can find more infos on our Circuit Simulator page here
And you can also access some reference designs here
Access the software here
It's included in all three tiers.
Tell us what you think about DS Circuit Simulator in the comments below :D