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Solid-state status
Original poster: "Kennan C Herrick by way of Terry Fritz <twftesla-at-uswest-dot-net>" <kcha1-at-juno-dot-com>
Holiday madness being upon us, my T.c. work has slowed. But some may
have interest in the current problem: Turns out my gate-drive lines are
too long. Some ringing but the more serious problem is Miller current at
MOSFET turn-off, causing turning on again of those that are supposed to
be going off, by virtue of the voltage drop in the too-long lines. Such
turn-on is a major no-no, of course, so I am having to re-do my
gate-driving scheme. It will take some semi-major scrambling-around of
circuits, cutting of p.c.-board traces, adding jumpers, etc. Dog-work,
like much of the previous toil leading up to the present design.
But basically, my "current-loop" scheme works and--as soon as we clear
this season's frenetic activities, I'll get to that dog work & advise.
No offense to dogs.
KCH
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