[time-nuts] Fast Rise/Fall Time Pulser
dk4xp at arcor.de
Tue Oct 10 21:46:16 UTC 2017
Am 10.10.2017 um 22:25 schrieb Magnus Danielson:
> This one, if you read what is written there:
I have used a ADCMP580 comparator on a home etched board
with semi rigid for the outputs. This is what I got from it:
I have also experimented with BAT15 Schottky limiters to get less rise
time at the cost of less amplitude.
That has been replaced by a 54754A differential TDR in the mean time :-)
The scope knows its own risetimes and can calculate them away, at least
BNC and 40 ps rise time don't go together well.
> On 10/10/2017 10:20 PM, Bruce Griffiths wrote:
>> It appears to be merely an ECL comparator;
>>> On 11 October 2017 at 09:14 Magnus Danielson
>>> <magnus at rubidium.dyndns.org> wrote:
>>> On 10/10/2017 09:42 PM, Brooke Clarke wrote:
>>>> Hi Larry:
>>>> How does it work.
>>>> When I was working with microwave semis it was either a tunnel
>>>> diode or
>>>> a Step Recovery Diode.
>>> Looking at the pictures, it seems like the surface mounted chip marked
>>> AJK AAA is the driver-chip that connects through a capacitor over to
>>> centerlead of the BNC output.
>>> Some form of driver, and setup such that amplitude scale can be
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