A <a href="https://en.wikipedia.org/wiki/Gyrator" class="extiw" title="en:Gyrator">gyrator</a> circuit
<a href="//commons.wikimedia.org/wiki/User:Alejo2083" title="User:Alejo2083">Alessio Damato</a>
CC BY-SA 3.0
own work, I made it with Xcircuit and post-processed with Inkscape