Drive train with two planetary gear sets, two motor / generators and a plurality of operating modes with power split

A powertrain operable in operating modes of input-split, output-split and compound-split, including a first motor / generator being continuously connected with a first member of a first planetary gear set. A second motor / generator being continuously connected with a first member of a second planetary gear set. An input member being continuously connected to a second element of the first planetary gear set. An output member is continuously connected to a second element of the second planetary gear set. A first brake establishes a third element of the first planetary gear set. A second brake establishes a third element of the second planetary gear. A first clutch connects the third element of the first planetary gear set with said second member of said second planetary gear set. A second clutch connects the second member of the first planetary gear set to the third element of the second planetary gear set.