Patent ID: 7371081

Claim:
A motor driver for a valve timing adjusting apparatus of an internal combustion engine, which has an electric motor to adjust valve timing of at least one of an intake air valve and an exhaust valve of the engine, the motor driver comprising first and second circuit boards that drive the electric motor by supplying a drive electric current to the electric motor, wherein: the first and second circuit boards are arranged one after another in a specific direction that is generally perpendicular to a plane of the first circuit board and a plane of the second circuit board; the first circuit board includes a first side terminal and a second side terminal, which are spaced from each other in a predetermined direction that is generally parallel with the plane of the first circuit board and the plane of the second circuit board; the second circuit board includes a first side terminal and a second side terminal, which are separated from each other in the predetermined direction and which are connected to the first side terminal and the second side terminal, respectively, of the first circuit board; the first side terminal of the first circuit board is arranged after the first side terminal of the second circuit board in the predetermined direction; and the second side terminal of the first circuit board is arranged after the second side terminal of the second circuit board in the predetermined direction.