Laser diode driving circuit

Details Laser diode driving circuit Laser diode driving circuit

2008-05-06

2008-05-06

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C327S514000

Reexamination Certificate

active

07369590

ABSTRACT:
A disclosed laser diode driving circuit causes a laser diode to emit light by varying a current value of a current source in accordance with a control signal input externally and supplying a current that is the same as or proportional to the current value to the laser diode. The driving circuit includes correction circuitry for generating a reference forward voltage as a reference for the laser diode in accordance with a predetermined driving current for driving the laser diode, generating a forward voltage for the laser diode in accordance with the predetermined driving current, and correcting a current supplied to the laser diode so that the forward voltage becomes the same as the reference forward voltage.

REFERENCES:
patent: 4813046 (1989-03-01), Shimada
patent: 5317578 (1994-05-01), Ogou
patent: 5517151 (1996-05-01), Kubota
patent: 5815025 (1998-09-01), Kubota
patent: 10-270784 (1998-10-01), None

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