High compliance laser driver

Details High compliance laser driver High compliance laser driver

2005-04-12

2005-04-12

Wong, Don (Department: 2821)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S038070

Reexamination Certificate

active

06879608

ABSTRACT:
A laser driver includes two DC-coupled differential drive circuits in which the common mode voltage of the first differential drive circuit is maintained a level affording a high compliance voltage for a laser diode driven by the second differential drive circuit. This is accomplished by means of an operational amplifier which compares the common mode voltage of the second differential drive circuit to a reference voltage. The operational amplifier operates in a closed-loop configuration to draw current through a common mode bias resistor in the first differential drive circuit in order to force the common mode voltage of the second differential drive circuit to a desired value determined by the reference voltage.

REFERENCES:
patent: 4529947 (1985-07-01), Biard et al.
patent: 6016081 (2000-01-01), O'Shaughnessy
patent: 6097159 (2000-08-01), Mogi et al.
patent: 6535534 (2003-03-01), Fischer
patent: 6760353 (2004-07-01), Wang
patent: 20030091076 (2003-05-01), Fischer
patent: 20030193977 (2003-10-01), Tsai
patent: 20040022284 (2004-02-01), Wang

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