The present invention relates to signal and power supply transmission for an X-ray source. In order to provided an improved signal and power supply transmission with reduced constructional complexity and enhanced operation possibilities, an integrated signal and power supply transmission arrangement is provided, comprising a supply board (12), a main board (14), an insulating plate (16), at least one transformer arrangement (18), and at least one signal transmission arrangement (20). The insulating plate is provided between the supply and the main board. The transformer arrangement is provided to supply electric energy to the driving circuit of a transistor, which in turn feeds an X-ray source. The transformer arrangement comprises a primary electric conductor arranged on the supply board to cause electromagnetic induction in a secondary electric conductor arranged on the main board. The signal transmission arrangement is adapted to transmit a signal between the supply board and the main board wherein the signal transmission arrangement comprises at least a first optical signal transmission device provided on the supply board, and a second optical signal transmission device (30) provided on the main board. The insulating plate is light-transmissive at least in the part between the first and second optical signal transmission device. The first and the second optical signal transmission devices are arranged in an optical connection path.
