[time-nuts] HP5370B & HP5345B Front-End IC Redesign Effort

Don Latham djl at montana.com
Wed Jan 27 20:12:15 UTC 2016

I have two A's and one B, and two Beaglebone replacements. I'm interested. If
we even had a block diagram, we'd be ahead!

Richard (Rick) Karlquist
> On 1/22/2016 2:14 PM, Mathew Breton wrote:
>> I was gifted an HP 5370B with the usual problem: front-end problems,
>> probably due to overstress. It is currently up and running again with a set
>> of 5345A series A3/A4 boards as I wasn't able to get a cheap pair of
>> 5088-706x hybrid ICs.
>> This sounds like a common problem. As a result, I'm designing an open-source
>> drop-in (hopefully) replacement. My hat is off to the original IC designer,
>> as it is not a trivial effort due to the wide input signal common-mode
>> range, and very tight trigger timing requirements. Other items (like the
>> E-ECL) output) are also adding a bit of extra effort.
>> I'm hoping that someone(s) might be interested in working with me on it. I
>> would like to have my assumptions and math checked before I start the
>> detailed design phase, and perhaps contribute some better ideas.
>> In addition, it would be really helpful if someone could run a few rise-time
>> dispersion tests on an instrument with a working "B"-series A3/A4 PCB set
>> (my unit obviously doesn't qualify).
>> Regards,
>> Mat Breton
> I would like to mention that the "father" of the 5370,
> David Chu, retired from Agilent a few years ago.  He
> might be receptive to giving you some advice about
> your project.  He is still very sharp technically.
> If there is sufficient interest,  I might be able
> to arrange for an introduction.  It would be helpful
> if we had a show of hands on time nuts as to how many
> people on time nuts are interested in this board.
> David was one of the best engineers in the history
> of the Santa Clara division and the fact that the
> 5370 lives on is a testimony to how far ahead of
> its time the design was, some 40 years ago.
> Rick Karlquist N6RK
> HP Santa Clara Division 1979-1998
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Felix qui potuit rerum cognoscere causas.
Lucky is he who has been able to understand the causes of things.
"Noli sinere nothos te opprimere"

Dr. Don Latham, AJ7LL
Six Mile Systems LLC, 17850 Six Mile Road
Huson, MT, 59846
mailing address:  POBox 404
Frenchtown MT 59834-0404

VOX 406-626-4304
CEL 406-241-5093
Skype: buffler2

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