Loading patent…
AssigneeSumitomo Electric Industries, Ltd.
InventorsNaoki Itabashi, Keiji Tanaka
Estimating the term…
An LD driver circuit includes an adjustment circuit, to which a power supply voltage is applied, which receives an input signal through an input terminal, and which generates a shifted input signal shifted in voltage from the input signal by a predetermined shift amount and outputs the shifted input signal from an output terminal; and a transistor, in which a base receives the shifted input signal, in which a collector is electrically connected to an anode of an LD, in which an emitter is electrically connected to a cathode of the LD and a ground, and which varies an amount of a shunt current flowing the collector to the emitter in accordance with the shifted input signal. The adjustment circuit includes a comparator which compares a voltage in the collector and a threshold voltage, and increases or decreases the predetermined shift amount in accordance with an output of the comparator.
A laser driver circuit configured to output a shunt current for driving a laser diode in accordance with an input signal, the laser driver circuit comprising:
Dependencies are inferred from the claim text.