Patent ID: 6969135

Claim:
A recording apparatus that uses information transmitted from an external device to scan a carriage mounting a recording head across a recording medium, the recording apparatus comprising: recording data generating means for converting information transmitted from an external device into recording data in accordance with a configuration of the recording head; a drive element for driving heat-emitting elements of the recording head selectively, based on the recording data converted by said recording data generating means; a first electric power supply circuit, having a first ground wiring, for supplying electric power to said drive element; and a second electric power supply circuit, having a second ground wiring different from the first ground wiring, for supplying electric power to the heat-emitting elements, wherein said drive element includes one of an emitter follower-type drive transistor and a source follower-type drive transistor, and wherein said first electric power supply circuit supplies the electric power to drive one of a base and a gate of said drive transistor.