On Thu, 05 Jan 2012 20:06:36 -0800, Robert Baer
wrote:
Fred Abse wrote:
On Wed, 04 Jan 2012 19:28:40 -0800, Robert Baer wrote:
I think that the curves also show definite avalanche mode for the
inverted mode...at least for the right base condition(s).
I don't see it. There's a definite negative resistance slope on the
forward traces, but I see none on the reverse characteristics.
Some traces (CMPT3904E, KST3904MTF) show signs of breaking into
oscillation at higher base currents. I've found that, usually, that's down
to parasitic L and C in the fixture, but in doesn't have to be.
yes..you are right; mis-remembered. I guess i should have pushed them
more in the inverted mode, but did not want to do any permanent damage.
I've cracked the BVceo shape with a simple TANH function... watch for
ensuing developments... I'm convinced I can model it.
...Jim Thompson
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