Dung V Tran

US Patent:

8041229, Oct 18, 2011

Filed:

Dec 12, 2008

Appl. No.:

12/333396

Inventors:

Alexander Umnov - Sachse TX, US
Dung Q. Tran - Grand Prairie TX, US
Takao Naito - Plano TX, US

Assignee:

Fujitsu Limited - Kawasaki

International Classification:

H04B 10/00

US Classification:

398164, 398141, 398135, 398139

Abstract:

A system for optoelectrical communication includes a transmitter configured to transmit optical signals. It also includes a pluggable form factor module. The module includes an input port, an output port, and a receiver configured to convert optical signals received at the input port into electrical signals. The system further includes an optoelectrical connector coupled to the module and the transmitter. The connector includes an embedded fiber coupled to the transmitter and configured to transmit the optical signals from the transmitter to the output port of the module. The connector also includes electrical contacts configured to receive the electrical signals from the receiver. The system includes a cage in a pluggable form factor configured to house the module and the connector, wherein the transmitter is positioned outside the cage.

US Patent:

8041230, Oct 18, 2011

Filed:

Dec 12, 2008

Appl. No.:

12/333424

Inventors:

Alexander Umnov - Sachse TX, US
Dung Q. Tran - Grand Prairie TX, US
Takao Naito - Plano TX, US

Assignee:

Fujitsu Limited - Kawasaki

International Classification:

H04B 10/00

US Classification:

398164, 398139, 398141

Abstract:

A method for upgrading an optoelectrical system includes securing a transmitter to a line card, wherein the line card comprises an optoelectrical connector. It also includes coupling the transmitter to the connector, wherein the connector comprises an embedded fiber configured to be coupled to the transmitter. In addition, the method includes inserting a pluggable form factor module comprising a receiver, an input port, and an output port into a cage secured to the line card. Further, the method includes coupling the pluggable form factor module to the connector such that an optical signal transmitted by the transmitter propagates in an optical line of sight between the embedded fiber of the connector and the output port. The connector comprises electrical contacts that are configured to be coupled to the module such that the receiver can convert optical signals received at the input port into electrical signals and transmit the electrical signals to the line card via the connector.

US Patent:

46671790, May 19, 1987

Filed:

Mar 7, 1985

Appl. No.:

6/709638

Inventors:

Simon M. Law - Torrance CA
Thierry L. Watteyne - Rancho Palos Verdes CA
Dung N. Tran - Wescosville PA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

H03M 168

US Classification:

340347DA

Abstract:

A weighted capacitor digital to analog converter is disclosed which requires only one stage and one conversion step. By the use of two reference voltages and two groups of capacitors in parallel, various capacitors in these groups can be selectively switched from the reference voltages to ground potential in response to input binary digit signals thereby presenting a predetermined amount of voltage to the output amplifier depending upon the number and particular combination of capacitors switched or non-switched to ground.