Optical system laser driver with a built in output inductor...

Details Optical system laser driver with a built in output inductor... Optical system laser driver with a built in output inductor...

2004-03-25

2008-08-12

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S038070, C372S038100, C372S029015

Reexamination Certificate

active

07411986

ABSTRACT:
A laser driver comprises a PNP transistor current source, an inductor coupled to the PNP transistor current source, a switch coupled to the inductor, and a current sink coupled to the switch. The PNP transistor current source supplies a first current to a laser if the switch is closed and a second current to the laser if the switch is open. The PNP transistor current source, inductor, switch, and current sink are on a single semiconductor chip.

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patent: 2003/0138008 (2003-07-01), Riaziat et al.
patent: 2005/0276290 (2005-12-01), Preisach

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