From: Mike Monett
X-Mailer: Mozilla 2.02 (Win16; I)
Subject: Re: Comb/Harmonic Generators
References: <email@example.com> <3DF0F01E.E17@Spam.Bots>
Date: Fri, 06 Dec 2002 15:43:59 -0500
NNTP-Posting-Date: Fri, 06 Dec 2002 15:44:01 EST
Organization: Bell Sympatico
John Larkin wrote:
> the PSPL sampler was designed by Agoston Agoston, who did the superb
> SD-series sampling heads when he was at Tek; the patents are cool to
> read. As soon as somebody around here blows up an SD-24, I'm going to
> take it apart and see the details. Can't wait!
> Agoston retired from Tek and started his own company, Hyperlabs,
> making sampling heads, TDRs, and once I think a real PC-based scope.
> Hyperlabs is still in business... http://www.hyperlabsinc.com/
Yes, I know about Agoston and Hyperlabs. He wrote the nice article on
the PSPL 100GHz sampler showing how they measured the ~3ps risetime:
Don't talk about blowing up a Tek sampler. I took one of my S-2's apart
to see how the bridge was made. It's pretty simple, and fortunately I got
it back together without destroying it.
Agoston's patents are fun to read. When we were working on the binary
sampler in Karlsruhe, we found a need for a fast step generator, but
Agoston's patent greatly exceeded the power budget. I used a simple
100EP16 and a few small resistors, and got 130ps risetime. I used the
differential outputs to balance the switching transient, and got the same
low overshoot he did.
Another great contributor to the 7000 series was our own favorite, Barrie
Gilbert. I came across a really nice article he wrote on innovation. It's
pretty long and repeats in places, but there is an interesting story of
his early childhood and how he got involved with electronics and
later went back and forth between Tek and ADI. It's here if you'd like to