[sdiy] anti pop mosfets in minibrute

[Mike Bryant]

My guess would be those are the actually specialist MOSFETs without the body diode.  Rare but they do exist.

Or it's just a poor design 🙂
________________________________
From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Chris McDowell via Synth-diy <synth-diy at synth-diy.org>
Sent: 24 April 2024 21:14
To: SDIY List <synth-diy at synth-diy.org>
Subject: [sdiy] anti pop mosfets in minibrute

<https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf>
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MiniBrute-10-OUTPUT<https://hackabrute.yusynth.net/MINIBRUTE/digital-board/schematics/MiniBrute-10-OUTPUT.pdf>
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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).

 From the vca page, that signal can be up to 2Vpp.  https://hackabrute.yusynth.net/MINIBRUTE/analog-board/schematics/MiniBrute-08-VCA.pdf

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? 😜

Cheers,
Chris McDowell
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