The group you are posting to is a Usenet group. Messages posted to this group will make your email address visible to anyone on the Internet.
Your reply message has not been sent.
Your post was successful
 |
Newsgroups: comp.soft-sys.math.mathematica
From: jpig...@cox.net
Date: Sun, 20 Aug 2006 08:49:33 +0000 (UTC)
Local: Sun, Aug 20 2006 4:49 am
Subject: RE:How to set up a diff equation for circuit with a diode?
The equation commes from the physics of a p-n junction. The 0.026 in front is really k*T/q, k== Boltzmann's constant, T is temperature in kelvin, q is the electronic charge.
The 10^12 inside is a function of the area ans structure of the diode. it can be thought of as also the reverse leakage current. It changes dramatically with temperature (~ proportional to T^3/2). Of course there are many reasons why real diodes deviate from this formula. series resistance will make higher by I*Rseries. At very low and very high currents, the ln[] function gets modified. Link to the forum page for this post: You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
| |||||||||||||