"It's been real DETROIT! I'll love ya forever. Philly Philly let's get it!!" Tate tweeted.
Tate, 30, has 44 catches for 517 yards and three touchdowns in seven games this season. He is in the final year of a five-year free agent contract he signed in March of 2014.
Tate posted 416 catches for 4,741 yards and 22 scores in 71 games across four and a half seasons with the Lions, earning a Pro Bowl nod in 2014.
The Eagles' receiving corps has been thinned by injuries this year, with both Mike Wallace and Mack Hollins on injured reserve after Alshon Jeffery missed the first three games of the season while recovering from shoulder surgery.
Tate is due about $3.7 million in salary over the remainder of the season and will be able to hit free agency in March. He has topped 90 catches in each of the past four seasons and gone over 1,000 yards in three of them.
The move will mean more work for second-year Lions wideout Kenny Golladay, who has moved into the starting lineup and received more snaps (88.2 percent) than Tate (79.4 percent) this season.
Golladay, who turns 25 on Saturday, has 30 grabs for 477 yards and three scores, already meeting or surpassing his totals from his rookie season.
It's the second consecutive year in which the Eagles have acquired a former Pro Bowler before the trade deadline. Last year, they sent a fourth-round pick to the Miami Dolphins for running back Jay Ajayi.
--Field Level Media
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)