DRIVE CURRENT SUPPLY CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a drive current supply circuit for raising the drive current of a laser diode quickly. SOLUTION: The drive current supply circuit for supplying a drive current I to a load 50 connected with the line 1R of a first current mirror circuit 1 having two parallel lines 1R and 2R comprises a control circuit CONT for controlling a current i flowing through the other line 1L based on the magnitude of a first control signalΣϕ1 having a steady DC componentϕD and a drive signal componentϕ1 being added thereto at a desired time.