<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Isn't the problem when the output goes *over* the forward voltage of the diodes? Below that limit , they won't conduct, or barely, anyway. In which case, keep the voltage low, but drive the current (it's a low impedance headphone output) and no problem. When the mosfets are on, the output is shorted to ground. When they're not, you're ok up to that (roughly) 2Vpp limit.<div class=""><br class=""></div><div class="">Am I just catching up on what you've already worked out? Wouldn't be the first time...;)</div><div class=""><br class=""></div><div class="">Tom</div><div class=""> <br class="">
<div><br class=""><blockquote type="cite" class=""><div class="">On 24 Apr 2024, at 21:14, Chris McDowell via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="content-type" content="text/html; charset=utf-8" class=""><div dir="auto" class=""><div class=""><div style="display: block;" class=""><div style="-webkit-user-select: all; -webkit-user-drag: element; display: inline-block;" class="apple-rich-link" draggable="true" role="link" data-url="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf"><a style="border-radius:10px;font-family:-apple-system, Helvetica, Arial, sans-serif;display:block;-webkit-user-select:none;width:300px;user-select:none;-webkit-user-modify:read-only;user-modify:read-only;overflow:hidden;text-decoration:none;" class="lp-rich-link" rel="nofollow" href="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" dir="ltr" role="button" draggable="false" width="300"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:#E9E9EB;font-family:-apple-system, Helvetica, Arial, sans-serif;" class="lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300"><tbody class=""><tr class=""><td vertical-align="center" align="center" class=""><span id="cid:A2192685-D4D4-4ACC-8747-FF1A61C44ECA"><preview.png></span></td></tr><tr class=""><td vertical-align="center" class=""><table bgcolor="#E9E9EB" cellpadding="0" cellspacing="0" width="300" style="font-family:-apple-system, Helvetica, Arial, sans-serif;table-layout:fixed;background-color:rgba(233, 233, 235, 1);" class="lp-rich-link-captionBar"><tbody class=""><tr class=""><td style="padding:8px 0px 8px 0px;" class="lp-rich-link-captionBar-textStackItem"><div style="max-width:100%;margin:0px 16px 0px 16px;overflow:hidden;" class="lp-rich-link-captionBar-textStack"><div style="word-wrap:break-word;font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-topCaption-leading"><a rel="nofollow" href="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" style="text-decoration: none" draggable="false" class=""><font style="" class="">MiniBrute-10-OUTPUT</font></a></div><div style="word-wrap:break-word;font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-bottomCaption-leading"><a rel="nofollow" href="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" style="text-decoration: none" draggable="false" class=""><font color="#A2A2A9" style="color: rgba(60, 60, 67, 0.6);" class="">PDF Document ยท 339 KB</font></a></div></div></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br class=""></div><div class=""><br class=""></div><div class="">hello list, I've been looking at minibrute schematics today and I'm puzzled by the anti pop circuitry in the headphone driver. it -seems- like the body diode of the mosfets would conduct when the signal went below 0.6ish volts (something I've run into this using mosfets for dc signal muting).</div><div class=""><br class=""></div><div class=""> From the vca page, that signal can be up to 2Vpp.  <a href="https://hackabrute.yusynth.net/MINIBRUTE/analog-board/schematics/MiniBrute-08-VCA.pdf" class="">https://hackabrute.yusynth.net/MINIBRUTE/analog-board/schematics/MiniBrute-08-VCA.pdf</a></div><div class=""><br class=""></div><div class="">What am I missing here? Is 2Vpp just fine in this case? Now reading the 2n7002 datasheet I see the forward voltage of the source-drain diode is typ 0.88V, 1.5V max. Did I just answer my own question? ๐Ÿ˜œ</div><br id="lineBreakAtBeginningOfSignature" class=""><div dir="ltr" class="">Cheers,<div class="">Chris McDowell</div></div></div>________________________________________________________<br class="">This is the Synth-diy mailing list<br class="">Submit email to: <a href="mailto:Synth-diy@synth-diy.org" class="">Synth-diy@synth-diy.org</a><br class="">View archive at: <a href="https://synth-diy.org/pipermail/synth-diy/" class="">https://synth-diy.org/pipermail/synth-diy/</a><br class="">Check your settings at: <a href="https://synth-diy.org/mailman/listinfo/synth-diy" class="">https://synth-diy.org/mailman/listinfo/synth-diy</a><br class="">Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" class="">marketplace@synth-diy.org</a><br class=""></div></blockquote></div><br class=""></div></body></html>