Dirty, ripping analog electro patch

this a question that has had be stumped for about a month. How does one get that ripping analog electro sound like we find in Bassjackers and Tommy Trash tracks (just to name a few)? Here are some examples:



Bassjackers

http://www.youtube.com/watch?v=DzRFmRmeYZ0



Tommy Trash

- YouTube



I tried syncing a high rate LFO to the cutoff frequency, but it didn’t really give me what I wanted, although I could be headed in the right direction. Anyone that can offer assistance with this would be greatly appreciated!