Trevitt tasted senior action for the Bees last season.
Advertisement
Advertisement
Latics head coach Ryan Lowe told the club website, external: "He's another goalscoring midfielder, who I think will be vital for us going forward.
"He comes from a good pedigree, and I am really looking forward to working with him.
"I think he's a real coup for us - and we're really happy to have him on board."