CURRENT GENERATING CIRCUIT, DRIVING IC AND CURRENT SUPPLYING CIRCUIT

摘要

A current generating circuit, a driving IC and a current supplying circuit are provided to have a constant output current, by compensating for an offset voltage of an operational amplifier. An output part(202) includes a first transistor and a second transistor. The first transistor transfers a reference current from a reference current input port to a reference current output port. The second transistor outputs a driving current according to the reference current. A control part(204) controls in order for voltages of three ports of the first transistor to be equal to voltages of corresponding three ports of the second transistor. The first and the second transistor have equal aspect ratio of a channel.