wrote in message
ups.com...
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.....

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)?


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


http://www.elektroda.net/cir/index/D...CTOR.htmgative


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

Thank you.

Impedance varies with frequency if there are reactive components, L's and
C's. Since you haven't told us whether this is a series or parallel circuit
of L's, R's and C's, We don't know what the impedance is at DC, zero
frequency or any other frequency for that matter. If it's a parallel circuit
the DC impedance is zero unless there is resistance in series with the L as
is the usual case. In that case, the impedance is R at DC. If it is a series
circuit, the DC impedance is infinite. SO, you have three choices, Zero
ohms, Infinite ohms or R ohms depending on the connection.

A peak detector will have to work on the range of voltages expected on it's
input. I can't get to the URL, sorry.
Bob