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From: Joerg <news@analogconsultants.com>
Newsgroups: sci.electronics.design
Subject: Re: Fast sampler
Date: Wed, 5 Mar 2025 17:07:06 -0800
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On 3/5/25 5:00 PM, Phil Hobbs wrote:
> On 2025-03-05 19:15, john larkin wrote:
>> On Wed, 5 Mar 2025 18:20:47 -0500, Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> Hi, All,
>>>
>>> Late last year we did a fast sampler/TDR with nice clean 60 ps edges.
>>>
>>> We're gearing up to actually sell them, so I did a short technical
>>> writeup on the design, which may be of interest.
>>>
>>> <https://electrooptical.net/News/a-high-performance-time-domain-reflectometer> 
>>>
> 
>>
>> Neat. No step-recovery diodes.
> 
> Well, 40 years does get you something sometimes. ;)
> 

And those cheap yet blazingly fast RF transistors, thanks to cell phones 
and all. They make nice pulsers. But they are like the princess on the 
pea, very low Vce and if you go a smidgen above ... poof.

[...]

-- 
Regards, Joerg

http://www.analogconsultants.com/