[ibis-macro] Re: On impulse and step responses.
- From: <fangyi_rao@xxxxxxxxxxx>
- To: <DBanas@xxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
- Date: Thu, 20 Jun 2013 09:18:17 -0600
David;
Step response has an unit of volt. Impulse response, which is the derivative of
step response by definition, has an unit of volt/sec. Also, please keep in mind
that the Dirac delta function has an unit of 1/sec.
Regards,
Fangyi
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of David Banas
Sent: Thursday, June 20, 2013 7:50 AM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] On impulse and step responses.
Hi all,
In our work, we often take as a priori that the impulse response is the time
derivative of the step response. As I puzzle over this further, I realize that
I'm stumped by something very fundamental, which is this:
A quantity, which is the time derivative of some other quantity, cannot have
the same units as that other quantity. And, yet, when we
discuss/measure/simulate either a step response or an impulse response, we
expect to be talking about / measuring / viewing a voltage as a function of
time, in both cases! How can this be?
Thanks,
-db
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