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<div class="moz-cite-prefix">On 13.12.2022 10:22, René Schmitz
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:fb8a7ae2-3fa2-5cfd-1987-3a5335b3d645@schmitzbits.de">
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<p>But if you swap + and -, and tap at the -input, then it works
like I'd expect.</p>
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<p>Now it starts to look familiar. The opamp forms a negative
impedance converter.<br>
</p>
<p>And of course one can as well tap at the + input. Forming a
voltage divider between C2/R1 and the NIC reflected R4/C1
impedance.<br>
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<p><br>
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<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-abbreviated" href="mailto:synth@schmitzbits.de">synth@schmitzbits.de</a>
<a class="moz-txt-link-freetext" href="http://schmitzbits.de">http://schmitzbits.de</a></pre>
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