kinda tough one

jlarkin 6 years ago

It took a week of spare time, 10 ECOs, to go from

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Nasty: parts on both sides with complicated clearance issues, picosecond stuff, crosstalk, serious thermals, panel arrangement issues, all sorts of things.

It was part tedious and part a lot of fun. I enjoy PCB layout for some reason, sort of a game like chess with more pieces.

There's a sort of DPAK thick-film 50 ohm resistor, bottom side lower right, that gets heat sinked to the box through giant copper pours.

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I may not be able to keep it cool worst-case, so there's a thermistor R14 to shut things down if it gets too hot.

John Larkin Highland Technology, Inc The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over Reason"

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Winfield Hill 6 years ago

What does J271 do? Does it have a datasheet yet?

Thanks, - Win

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jlarkin 6 years ago

I call it ADG, analog delay generator, but it could have a better name. All my code kiddies are busy on c and VHDL and Python, so I'm designing code-free boxes to stay amused. This is a tiny (3x2x1") delay-and-width pulse generator. It will have three time ranges, 25ns,

250ns, 2.5 us, with pots to set delay and width in each range. Output is my little glob-topped GaN driver thing. It will be specified for 1 to 20 volt pulse output, but I think I can spin a version that uses a 48 volt wart and can make 45 volt pulses, and charge more for that one.

TPG tiny pulse generator

EDGE embedded delay generator

SPUD small pulse delay generator

I should decide and put up a web page.

I might do a pulse amplifier version too. Just strip off most of the parts from that one. Easy. Maybe make the pulse low level adjustable, like +-5 instead of ground. The little globbed thing can do that.

John Larkin Highland Technology, Inc The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over Reason"

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