Doepfer

Hiya! 

So I'm trying to rig up the +5V gate output of a Doepfer A-190-3 MIDI to CV converter module to the +5 to +12V trigger input of some Analogue Solutions modules, namely their BD88, SD88 and CP88. I suspect I'm just on the threshold as to whether I'm actually triggering them or not. Is there an easy way to convert +5V into a little bit more, preferably with the ability to send just a trigger pulse rather than a sustained gate? 

Thanks! 
Zoë.