[time-nuts] Fast risetime pulse generator

Magnus Danielson magnus at rubidium.dyndns.org
Wed Apr 13 21:15:39 EDT 2016



On 04/14/2016 12:32 AM, David wrote:
> On Wed, 13 Apr 2016 00:03:03 -0500, you wrote:
>
>> ...
>>
>> If you are building up something, you probably want a SRD (step
>> recovery diode) or tunnel diode. But both may be hard to find and
>> expensive these days.
>
> Step recovery diodes are very similar in construction to varactor
> diodes so the later can be used in step recovery applications with
> qualification.
>
> I have also seen the 1N4148 used as a step recovery diode when driven
> by an avalanche pulser but I do not know if it was qualified.

Check Fig.7 in the datasheet:
http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf

A SRD source I just found is:
http://www.adsemi.com/diodes/step_recovery.shtml

Cheers,
Magnus


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