Laser diode driving circuit and laser diode controlling apparatus including the laser diode driving circuit

摘要

A laser diode driving circuit and a laser diode controlling apparatus including the laser diode driving circuit. The laser diode driving circuit includes a voltage drop prevention unit, which prevents a voltage at an input terminal of the laser diode driving circuit from dropping to a predetermined voltage level or lower, the input terminal of the laser diode driving circuit being connected to an output terminal of the ALPC circuit.