wrote:
2 questions about a fully DC Sine Wave....let's suppose you have a DC
Sine wave which varies from +5V to +15V peak-to-peak going into a load
with R, L, and C components.....

There is no such thing as a "DC sine wave." I suspect you mean what would
more correctly be described as a 10 volt peak-to-peak sine wave with a +10
volt DC offset.

Question #1:
Is the load's impedance a function of R, L, and C (and wave frequency)
or is it simply just R (i.e. Z=R)? In other words does non-resistive
impedance (L + C) really only matter with an AC signal OR anytime
voltage varies periodically (even if it is all DC)?

The principle of superposition applies: the currents and voltages in the
circuit will be the sum of those that would result if the DC voltage and the
AC sine wave were applied to it seperately.

Question #2:
Would a "regular" negative peak detector ciruit, like shown he


http://www.elektroda.net/cir/index/D...20DETECTOR.htm


work for the DC Wave described? Will it output +5V or do negative
peak detectors only work for AC signals?

That circuit (I've fixed the link) exploits the fact that the LM139
comparator has an open-collector output. It runs off a negative rail, and
cannot produce a positive output voltage.