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Another SSTC Question



Original poster: "Marry Krutsch by way of Terry Fritz <twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>

Hi everyone.

	I'm trying to build a driver for my (future) MOSFETs, but I'm not sure
about a few things.  I want to isolate the signal electronics from coil
driving electronics using a ferrite toroidal xfmr (that's the right
thing to do, right???).  The problem is, I can't get a "good" clean
signal out of the transformer.  Depending on the pulse width and
frequency fed to it, I get a bumpy output that ranges from positive to
negative (which I kind of expected, yet it isn't helpful).  I know a
noisy signal is OK, as long as there's enough power to saturate the
MOSFETs.

	Also, is it OK to run a SSTC with BiPolar transistors?  I've got a ton
of them, and my previous futil attempts at a SSTC driver chewed up all
my MOSFETs and spat them out :-(.  I actually toasted a 600v unit with
only 30v in, although I only had a power diode across the transistor for
"protection" (which probably helped little, if at all).

	Have I got the right idea, or have I totally missed the boat?  Please
help.

Stumped (as usual),
Winston K.