<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">pff lol, you got me. ๐คฆโโ๏ธ<br><div><br><blockquote type="cite"><div>On Apr 24, 2024, at 4:42 PM, Chris McDowell <declareupdate@gmail.com> wrote:</div><br class="Apple-interchange-newline"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hehe that would be funny as they're even drawn in the schematic symbol! and labelled 2n7002. Yves Usson did this fella, if I'm understanding the internet correctly. <div><br><div><br><blockquote type="cite"><div>On Apr 24, 2024, at 4:30 PM, Mike Bryant <mbryant@futurehorizons.com> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">My guess would be those are the actually specialist MOSFETs without the body diode. Rare but they do exist.</div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br></div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Or it's just a poor design ๐</div><div id="appendonsend" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"></div><hr tabindex="-1" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline-block; width: 670.3125px;"><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;"></span><div id="divRplyFwdMsg" dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span class="Apple-converted-space"> </span>Synth-diy <synth-diy-bounces@synth-diy.org> on behalf of Chris McDowell via Synth-diy <synth-diy@synth-diy.org><br><b>Sent:</b><span class="Apple-converted-space"> </span>24 April 2024 21:14<br><b>To:</b><span class="Apple-converted-space"> </span>SDIY List <synth-diy@synth-diy.org><br><b>Subject:</b><span class="Apple-converted-space"> </span>[sdiy] anti pop mosfets in minibrute</font><div> </div></div><div dir="auto" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div><div style="display: block;"><div class="x_apple-rich-link" role="link" data-url="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" style="display: inline-block;"><a class="x_lp-rich-link" rel="nofollow" href="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" dir="ltr" role="button" width="300" style="border-radius: 10px; font-family: -apple-system, Helvetica, Arial, sans-serif; display: block; width: 300px; overflow: hidden; text-decoration: none;"><table class="x_lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300" style="table-layout: fixed; border-collapse: collapse; width: 300px; background-color: rgb(233, 233, 235); font-family: -apple-system, Helvetica, Arial, sans-serif;"><tbody><tr><td align="center"><span id="cid:A2192685-D4D4-4ACC-8747-FF1A61C44ECA"><preview.png></span></td></tr><tr><td><table bgcolor="#E9E9EB" cellpadding="0" cellspacing="0" width="300" class="x_lp-rich-link-captionBar" style="font-family: -apple-system, Helvetica, Arial, sans-serif; table-layout: fixed; background-color: rgb(233, 233, 235);"><tbody><tr><td class="x_lp-rich-link-captionBar-textStackItem" style="padding: 8px 0px;"><div class="x_lp-rich-link-captionBar-textStack" style="max-width: 100%; margin: 0px 16px; overflow: hidden;"><div class="x_lp-rich-link-captionBar-textStack-topCaption-leading" style="overflow-wrap: break-word; font-weight: 500; font-size: 12px; overflow: hidden; text-overflow: ellipsis; text-align: left;"><a rel="nofollow" href="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" style="text-decoration: none;"><font style="">MiniBrute-10-OUTPUT</font></a></div><div class="x_lp-rich-link-captionBar-textStack-bottomCaption-leading" style="overflow-wrap: break-word; font-weight: 400; font-size: 11px; overflow: hidden; text-overflow: ellipsis; text-align: left;"><a rel="nofollow" href="https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf" style="text-decoration: none;"><font color="#A2A2A9" style="color: rgba(60, 60, 67, 0.6);">PDF Document ยท 339 KB</font></a></div></div></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br></div><div><br></div><div>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><br></div><div> 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">https://hackabrute.yusynth.net/MINIBRUTE/analog-board/schematics/MiniBrute-08-VCA.pdf</a></div><div><br></div><div>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? ๐</div><br id="x_lineBreakAtBeginningOfSignature"><div dir="ltr">Cheers,<div>Chris McDowell</div></div></div></div></blockquote></div><br></div></div></div></blockquote></div><br></body></html>