In the image below, I do understand that a grounded inductor can be simulated using op amps. However, to make a floating simulated inductor, I have read some posts that said two ground simulated inductors must be connected back to back. I am not sure why they should be connected back to back, as shown in the bottom diagram. Why must they be connected back to back?

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    \$\begingroup\$ You posted a very similar question yesterday. If you don't get answers to your question, we ask you to improve the question by editing it, not re-post it. \$\endgroup\$ – The Photon Jun 3 '20 at 16:07
  • \$\begingroup\$ Here you can find a simpler version: 1- Grounded inductor obrazki.elektroda.pl/3464261900_1482234787.gif and the floating one youtu.be/AEJtajaRj_s?t=289 the same lh6.googleusercontent.com/… \$\endgroup\$ – G36 Jun 3 '20 at 16:17
  • \$\begingroup\$ While they are not exact duplicates (they are different questions on the same topic), @SEJ you should go and answer your question (because you found a floating inductor). \$\endgroup\$ – Voltage Spike Jun 3 '20 at 16:26
  • \$\begingroup\$ @VoltageSpike Thanks for the reminder. Though I'm not exactly sure how to accept comments as answered, I edited the title. I'm sorry I'm not very used to the stackoverflow community. I've only just made an account. Thank you for helping me adapt. \$\endgroup\$ – SEJ Jun 3 '20 at 16:40
  • \$\begingroup\$ @ThePhoton I did indeed post that question, which led to this question. Yes, I found out that the term I was trying to find was 'floating' simulated inductor, which was very helpfully answered. However, I thought editing the entire question to asking why two ground simulated inductors need to be connected back to back to simulate a floating inductor would be too much of a change. Thank you for the suggestion though, I'm still getting used to this blessed community. (edit: spelling) \$\endgroup\$ – SEJ Jun 3 '20 at 16:45

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