Considering a short parabolic impulse as direct current?


by freddyfish
Tags: current, impulse, parabolic
freddyfish
freddyfish is offline
#1
Feb10-13, 07:22 AM
P: 57
Is it possible to consider a short (20ns) impuls of only one polarity as a short segment of direct current in a simple circuit where the reflections are to be analyzed? If not, how should I treat this kind of voltage waves?

The voltage is obviously not constant, but I wonder if it is possible to use ordinary formulas for reflections etc.

Thanks
Phys.Org News Partner Engineering news on Phys.org
A smart prosthetic knee with in-vivo diagnoses
Old tires become material for new and improved roads
Students take clot-buster for a spin
sophiecentaur
sophiecentaur is offline
#2
Feb11-13, 05:33 AM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,383
You can't discuss reflections in terms of DC. The essential point about a reflection is that there is a change, in time, in value of the signal - i.e. it's there because of non-DC components of the signal.
You need to be thinking in terms of the Impulse Response of your circuit, which you can obtain either directly or by measuring the frequency response (including phase information) and then a Fourier Transform.
freddyfish
freddyfish is offline
#3
Feb11-13, 11:48 AM
P: 57
Thank you very much! Very good answer. :)


Register to reply

Related Discussions
Very basic, short impulse problem. Just need some explanation. Introductory Physics Homework 2
Resistance and Current-Direct Current Circuits Introductory Physics Homework 7
alternating current versus direct current General Physics 18
Alternating Current vs Direct Current General Physics 17
Electric current and direct current circuits Introductory Physics Homework 14