High-speed CMOS driver for optical sources

Details High-speed CMOS driver for optical sources High-speed CMOS driver for optical sources

1995-06-01

1996-12-31

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327103, 327404, 327514, H03K 342

Patent

active

055897860

ABSTRACT:
The circuit in CMOS technology allows high speed driving of optical sources, in particular laser diodes, operating efficiently at speeds that meet the requirements imposed by optical fiber communication systems and avoiding interference between driving currents and biasing current in the optical source. The circuit utilizes a bias current generator, a modulation current generator and a cascade of CMOS inverter stages that supplies a driving voltage to the modulation current generator and receives digital signals at its input. It is possible to independently adjust the bias current, so as to allow driving sources with different threshold currents, and to adjust the modulation current.

REFERENCES:
patent: 4412140 (1983-10-01), Reynolds
patent: 4819241 (1989-04-01), Nagano
patent: 5089727 (1992-02-01), Molitor et al.
patent: 5111065 (1992-05-01), Roberge
Journal of Lightwave Technology, vol. 6, No. 3, Mar. 1988, NY, pp. 475-479, Chen et al, GaAs MESFET Laser-Driver IC for 1.7 Gbit/s Lightwave Transmitter.
IEEE Journal of Solid-State Circuits, vol/28, No. 7, Jul. 1993, NY, pp. 829-833, Wang et al, Integrated Laser-Diode Voltage Driver for 20-Gb/s Optical Systems Using 0.3 Micrometer Gate Length Quantum-Well Hemt's .
Electronics Letters, vol. 30/No. 10, 12 May 94, pp. 774-776, J. Riishoj-5 Gbit/s Laser-Driver GaAs IC.
IEEE 1991, Custom Integrated Circuits Conference, 12 May 91, San Diego CA, pp. 2751-2754, Shastri et al, "1.2 Gb/s Integrated Laser Driver with Temperature Compensation for Modulation Current".
"150 Mbit/s CMOS LED-driver and PIN-receiver IC for Optical Communication", M. Steyaert et al, IEEE 1992 Custom Integrated Circuits Conference, 4 pages.

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