Re: Huh, does anyone put 2N3904 dies in a TO-126 or so?

On Sep 27, 9:17 pm, Vladimir Vassilevsky <nos...@xxxxxxxxxxx> wrote:
Another ingenious idea could be connecting few dozens of 2N3904 in parallel.

Heh. The capacitance would go up a lot, though. Okay, Ic does too,
but still, on a PCB there's more stray than if it were done hybrid or
monolithic (more emitter fingers?).

What I was thinking about was something like the C2682 (which Mouser
currently sells), or 3502 or 3953 (doesn't), or 3595 (which I've
pulled from old Trinitrons).

But really, the thought occured to me because I was simulating a
circuit, and not having a 2SC2682 model, I thought, meh I'll just put
in a 2N3904... the model is bad enough (no 2nd breakdown, avalanche,
no falling hFE at high Ic) that it works pretty well just as if
someone made a '3904 that did 5W and 100V. And with fT = 300MHz,
it'll do better than a 2SC3502 (I was getting 10ns edges from the
output :-) ).

Tim
.

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