Bah. The "buffer" was just technobabble. I doubt writers know themselves what things are supposed to mean even half the time.
But to do a replicator, you would need to feed it matter and very large amounts of energy.
In Star Trek, unlike transporters which send both matter and energy, the replicators create only matter (albeit hot or cold). They might be related, but they are not the same type of tech. Also, both are driven by some future type of nuclear super-reactor that runs on the fictional "Dilithium".
The Stargate universe's star gates don't need much energy. They are based on wormholes, and the control circuitry could run on batteries. The Asgard have transporters and replicators though.
BTW, check out the top-left key on a German keyboard!