Multi-level optical data communication circuit

Details Multi-level optical data communication circuit Multi-level optical data communication circuit

2006-06-30

2009-11-03

Phan, Hanh (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S182000, C398S183000, C398S192000, C398S193000, C398S196000, C398S197000, C398S198000, C375S286000, C375S287000, C375S316000, C375S317000, C372S032000, C372S034000, C372S036000, C372S038020, C385S088000, C385S089000, C385S092000, C385S093000

Reexamination Certificate

active

07613400

ABSTRACT:
A driver circuit is coupled to an optical waveguide transmitter. The driver circuit has a current generator that is in series with the transmitter, and a current robbing circuit is coupled to the transmitter. The current robbing circuit is to divert first and second amounts of current from the transmitter, in accordance with predetermined values of first and second bit streams, respectively, in which data is received to be transmitted. Other embodiments are also described and claimed.

REFERENCES:
patent: 2002/0167693 (2002-11-01), Vrazel et al.
patent: 2003/0030873 (2003-02-01), Hietala et al.
patent: 2003/0223762 (2003-12-01), Ho et al.
David Cunningham, “Multilevel Modulation for 10GbE: Link and Component Specification Issues”, IEEE 802.3 High Speed Study Group Jul. 1999 Plenary Week Meeting, Jul. 6-7, 1999, Montreal, PQ (19 pages).

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