Fastest Monostable Multivibrator?

[SethC]

Dear all,

I am trying to build a circuit that detects a trigger (~2 ns rise time) and outputs a constant pulse (~ several nanoseconds). All other triggers are ignored until the constant pulse is finished. To me, this seems like a monostable multivibrator. Is this correct? Also, do they make anything at this speed? Texas Instruments sells chips on the order of ~100 ns. Should I try designing one myself? I have seen designs that implement logic gates like this:

Multivibrators including Monostable, Astable and Bistable

This design responds to the first trigger, but if a second pulse comes in during the pulse, it causes it to misfire. Any possible solutions? Your help would be greatly appreciated.

-Seth

 

[dick_freebird]

There are retriggerable and non-retriggerable designs out there, all the old
school SSI logic is going to be way too slow for you I expect. A few-nS
pulse would need to either be on-chip only, or a nice tight transmission
line if you want any kind of timing fidelity. Single ended CMOS drivers
are going to have a hard time with any board loading at all, when you
get under 5-10nS pulse width.