> On 2020-01-02, at 19:00, laughton_at_cyg.net wrote: > >> "bring your board under microscope, cut the 12th 0,0Xmm wide trace out of 37 running close to each other, then .... " > > Hmmm, yeah... I can see how that suggestion might not appeal to all users! :) Right. That's what I thought too :-) >> I have to fiddle somewhere in the middle (of the transmission line). > > No easy answer, then. > > Would it make sense it install a noninverting buffer IC and break the signal path into *two* transmission lines? There are some really tiny, single-gate IC's available in 6-pin SMD packages, and the prop delay is generally 3 ns or less. One of ideas we also brainstormed was in fact to buffer the signal and split the line. I suppose it would require a fast buffer (like what you mention) with Schmitt-trigger input. But since we couldn't easily test it (I don't even have anything similar at hand), and it might still be not enough with 2Vpp ringing out there. > A quick plug re these IC's: I can't promise they're the solution to the issue at hand, but these IC's do offer a *lot* of problem-solving power. Anyone who enjoys hacking hardware should become familiar with them, IMO. For an overview, see my post on anycpu.org "Tiny, superfast gates rival programmable logic" > > http://anycpu.org/forum/viewtopic.php?f=16&t=270&p=1803 Yes, I'll certainly get my hands dirty on those. -- SD!Received on 2020-05-30 00:05:20
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