[time-nuts] Fast risetime pulse generator

Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Apr 12 21:44:26 EDT 2016


On Wednesday, April 13, 2016 12:36:54 AM Gerhard Hoffmann wrote:
> Am 12.04.2016 um 22:30 schrieb BIll Ezell:
> > (cross-posted to volt-nuts)
> > After paying only limited attention to this topic, I suddenly have a
> > need for a pulse generator that has <150 ps risetime and a pulse width
> > of at least 2 ns. 100mv amplitude or more is fine. I've looked at the
> > classic Jim Williams avalanche generator, but I don't want to have to
> > deal with the (relatively) high voltage source needed.
> 
> This is what an Analog Devices ADCMP580 comparator produces. Available
> from Digi-Key.
> 
> regards, Gerhard
The LTC6954 programmable divider evaluation board has ECL outputs with 110ps 
transition times. Accepts input up to 1.4GHz.
I have cascaded a couple of these to quickly produce a low jitter output 
divided down from 100MHz.

Bruce


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