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From: Robert Baer
X-Mailer: Mozilla 4.75 [en] (Win98; U)
Subject: Re: Strange going-on with a floating MOSFET gate
Date: Mon, 06 Jan 2003 07:33:44 GMT
NNTP-Posting-Date: Sun, 05 Jan 2003 23:33:44 PST
Organization: EarthLink Inc. -- http://www.EarthLink.net
Winfield Hill wrote:
> Kevin McMurtrie wrote...
> > Winfield Hill wrote:
> >> Reporting on some strange business with a floating MOSFET gate...
> > [snip]
> >> ,-----+---- current -----,
> >> | | recorder |
> >> D volt +
> >> float --- G meter supply
> >> 2.04V S 695mV -
> >> | | |
> >> '-----+------------------'
> > Did you shield the gate?
> None of the setup was shielded; hookup was with Pomona leads. The
> floating 2n7000 gate consisted of its usual 0.5" small-dia. lead.
> Clearly 60Hz ac pickup with this setup could have been responsible
> for the strange goings on; the experiment will have to be repeated.
> - Win
Be advised that a static charge can be either accidently applies in
hanfling, or induced.
That charge can drive the FET anywhere from cutoff to saturation.
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