Hi
Hows the application going? I am unsure if there are any quadrature demodulators already in multisim, due to its niche nature. However you are able to create a custom component, and please find below a link of how to do this. I have also attched a third party website with some details of the componets in a quadrature demodulator, which may help you in creating it.
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YH5fCAG&l=en-US
http://www.eetimes.com/document.asp?doc_id=1275839
I hope this helps you out, please let me know if you have any questions
Thanks
Sarah
