Laser diode driver architectures

Details Laser diode driver architectures Laser diode driver architectures

2011-05-10

2011-05-10

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular component circuitry

Controlling current or voltage to laser

C372S038020, C372S038080

Reexamination Certificate

active

07940824

ABSTRACT:
Laser diode driver architectures are disclosed. Some example current drivers are described, including a current channel to provide an output current. The current channel includes a current mirror with emitter degeneration, a startup transistor coupled to the current mirror to generate a DC bias on the current mirror, a beta helper circuit coupled to the current mirror and the startup transistor, to maintain the DC bias on the current mirror, and a cutoff transistor coupled to an emitter terminal of a current mirror transistor and to a reference voltage, to selectively couple the emitter terminal to the reference voltage to conduct the pre-determined output current. The example current drivers also include an output stage coupled to the output of the current mirror and to an output device, wherein the output stage provides a current gain in response to the cutoff transistor coupling the emitter terminal to the reference voltage.

REFERENCES:
patent: 6717463 (2004-04-01), Aparin et al.
patent: 6972624 (2005-12-01), Stroet
patent: 2009/0262769 (2009-10-01), Bergmann et al.

Affiliated with

Also associated with

Rating

Laser diode driver architectures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laser diode driver architectures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser diode driver architectures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2643029