In 1984, at Wang Labs, I demonstrated that (to the limit of our 400 MHz
Tek 'scope) the waveform from a KeyTek simulator and a human body was
equivalent; I charged myself to 5 KV and discharged a finger to the target.
Dark-side-of-the-force Department: using a Sharp contact-discharge tip,
I could produce enough ions to charge unsuspecting management
"trespassing" on our lab's linoleum floor enough to shock themselves
when they touched a metal door on the way out.
Heh!
Cortland Richmond
ka5s
On 3/8/2013 1029, Ken Wyatt wrote:
Yes, and the ESD standard was written when the best scope we had was
just 1 GHz BW. Having worked for the HP/Agilent scopes division for
20+ years, and with an interest in ESD, I had access to the some of
the highest BW tools possible. Every time I remeasured the ESD
waveform (using either the old or new target, as appropriate) the
waveform got faster - imagine that! As of 2008 when I retired, I was
measuring a 100 to 200 ps rise times with a real time BW of 20 to 30 GHz.
Definitely an art when it comes to ESD and testing to the standard.
Ken
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Wyatt Technical Services LLC
Woodland Park, CO
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