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<div dir="ltr" data-setdir="false">Hi,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I think you need a clamping circuit. Check out this link:</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><a href="https://www.tutorialspoint.com/linear_integrated_circuits_applications/linear_integrated_circuits_applications_clampers.htm" rel="nofollow" target="_blank">https://www.tutorialspoint.com/linear_integrated_circuits_applications/linear_integrated_circuits_applications_clampers.htm</a></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">BR</div><div dir="ltr" data-setdir="false">Björn<br></div>
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Den torsdag 16 december 2021 04:09:09 CET, Jean-Pierre Desrochers <jpdesroc@oricom.ca> skrev:
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<div><div dir="ltr">Hi Tom,<br clear="none"><br clear="none">>Harry Bissell's envelope follower is well thought of for its combination of speed and accuracy.<br clear="none">><a shape="rect" href="https://modwiggler.com/forum/viewtopic.php?t=109067" target="_blank">https://modwiggler.com/forum/viewtopic.php?t=109067</a><br clear="none"><br clear="none">This is a very clever project and neat design.<br clear="none">But still too much ‘lag’ on the falling edges incoming signal.<br clear="none">So far.. a PIC would do best with least components..<br clear="none">Hmmmm...<br clear="none">As usual.. Thank you for you good suggestion anyway !<br clear="none">JP<br clear="none"><br clear="none"><br clear="none">De : Tom Wiltshire <<a shape="rect" ymailto="mailto:tom@electricdruid.net" href="mailto:tom@electricdruid.net">tom@electricdruid.net</a>> <br clear="none">Envoyé : 15 décembre 2021 04:08<br clear="none">À : Jean-Pierre Desrochers <<a shape="rect" ymailto="mailto:jpdesroc@oricom.ca" href="mailto:jpdesroc@oricom.ca">jpdesroc@oricom.ca</a>><br clear="none">Cc : <a shape="rect" ymailto="mailto:Synth-diy@synth-diy.org" href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br clear="none">Objet : Re: [sdiy] Best & fastest envelope follower schematic.. anybody ?<br clear="none"><br clear="none">Hi JP,<br clear="none"><br clear="none">Harry Bissell's envelope follower is well thought of for its combination of speed and accuracy.<br clear="none"><br clear="none"><a shape="rect" href="https://modwiggler.com/forum/viewtopic.php?t=109067" target="_blank">https://modwiggler.com/forum/viewtopic.php?t=109067</a><br clear="none"><br clear="none">It's a good circuit, but pretty complicated, especially for an effect pedal design. So like you, I thought "PIC!", and had a go at implementing it in firmware.<br clear="none"><br clear="none">The round-robin three peaks detectors are easy enough. Doing the output filtering is more demanding on a chip with no multiply, but I managed it by being choosy about the filter coefficients and keeping things binary friendly. The end result was pretty good and used a little PIC to the maximum extent.<br clear="none"><br clear="none">HTH,<br clear="none">Tom<br clear="none"><br clear="none">==================<br clear="none"> Electric Druid<br clear="none">Synth & Stompbox DIY<br clear="none">==================<br clear="none"><br clear="none"><br clear="none"><br clear="none"><br clear="none">On 15 Dec 2021, at 01:34, Jean-Pierre Desrochers <mailto:<a shape="rect" ymailto="mailto:jpdesroc@oricom.ca" href="mailto:jpdesroc@oricom.ca">jpdesroc@oricom.ca</a>> wrote:<br clear="none"><br clear="none">Hi all,<br clear="none">I’m looking for a fast and accurate voltage follower circuit.<br clear="none">There are plenty of them on the web to build but they all<br clear="none">suffer of inaccuracy and lag on the final DC output (final stage of low pass to smooth off the incoming peaks).<br clear="none">The incoming voltage will be a varying 0 to +/-5v peak.<br clear="none">I thought about implementing a solution using a small PIC with ADC/DAC<br clear="none">but even if these micros are very cheap this solution would be overkill.. would it be ?<br clear="none">So far the available circuits have too much lag on their DC output.<br clear="none">(The envelope takes too much time to get back to zero after a fast incoming peak)<br clear="none">Any known & reliable circuits ?<br clear="none">JP<br clear="none">_______________________________________________<br clear="none">Synth-diy mailing list<br clear="none">mailto:<a shape="rect" ymailto="mailto:Synth-diy@synth-diy.org" href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br clear="none"><a shape="rect" href="http://synth-diy.org/mailman/listinfo/synth-diy" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br clear="none">Selling or trading? Use mailto:<a shape="rect" ymailto="mailto:marketplace@synth-diy.org" href="mailto:marketplace@synth-diy.org">marketplace@synth-diy.org</a><div class="yqt6288712601" id="yqtfd54534"><br clear="none"><br clear="none"><br clear="none"><br clear="none">_______________________________________________<br clear="none">Synth-diy mailing list<br clear="none"><a shape="rect" ymailto="mailto:Synth-diy@synth-diy.org" href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br clear="none"><a shape="rect" href="http://synth-diy.org/mailman/listinfo/synth-diy" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br clear="none">Selling or trading? Use <a shape="rect" ymailto="mailto:marketplace@synth-diy.org" href="mailto:marketplace@synth-diy.org">marketplace@synth-diy.org</a><br clear="none"></div></div></div>
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