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From: "Phil Allison"
References: <email@example.com> <firstname.lastname@example.org>
Subject: Re: Thermal runaway: please settle this dispute!
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Sat, 4 Jan 2003 10:22:12 +1100
NNTP-Posting-Date: Sat, 04 Jan 2003 10:12:15 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"chris" wrote in message
> "Phil Allison" wrote in message
> Hi, vbe does fall at 2mv/degC but that has nothing to do with thermal
** It has EVERYTHING to do with thermal runaway.
which is caused by the increase in collector-base leakage
** Only some geraniums maybe.
which subsequently gets multiplied by the devices gain
> (hfe).Modern silicon devices dont really suffer much from this
> problem, its an issue of yesteryears germainium transistors.
** They do not suffer from serious CB leakage but they sure as hell can
easily suffer from thermal runaway if the heatsink is not adequate and
thermal feedback compensation is not applied properly.
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