On Tue, 12 Oct 2004 17:10:41 -0500, "Steve Nosko"
wrote:

[snip]
IF we had 5 volts peak (10 volts peak-to-peak) the cap left side, the base
voltage will swing from +0.7 volts to -9.3 volts.

WHEW !
Did this work

Sure did, Steve! I ran it through a spice program and you're right in
every detail. So there's obviously some basic flaw in my understanding
of caps. The textbooks say to treat a cap as a short circuit at AC
(assuiming its reactance isn't too high at the frequency of interest).
That would appear to be grossly misleading as there's a huge
difference between the mean voltage levels on each side. It's gonna
take me a while to get this trough my thick skull. :-(
So what happens when you have a small ac ripple riding on a DC bias?
I'll spice it but won't understand it, I guess. :-(

--

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