Daniel Wonchae Chung

US Patent:

6466520, Oct 15, 2002

Filed:

Feb 5, 1999

Appl. No.:

09/244753

Inventors:

Gil A. Speyer - Los Angeles CA
David L. Ferguson - Beaconfield, CA
Daniel Y. Chung - San Jose CA
Robert D. Patrie - Scotts Valley CA
Robert W. Wells - Cupertino CA
Robert O. Conn - Los Gatos CA

Assignee:

Xilinx, Inc. - San Jose CA

International Classification:

G04F 800

US Classification:

368118, 368120, 324617, 327265, 331 57

Abstract:

A circuit measures the signal propagation delay through a selected test circuit. The test circuit is provided with a feedback path so that the test circuit and feedback path together form a free-running oscillator. The oscillator then automatically provides its own test signal that includes alternating rising and falling signal transitions on the test-circuit input node. A phase discriminator samples the output of the oscillator and accumulates data representing the signal propagation delay of either rising or falling signal transitions propagating through the test circuit. The worst-case delay associated with the test circuit can then be expressed as the longer of the two. Knowing the precise worst-case delay allows IC designers to minimize the guard band and consequently guarantee higher speed performance.

US Patent:

6611477, Aug 26, 2003

Filed:

Apr 24, 2002

Appl. No.:

10/132419

Inventors:

Gil A. Speyer - Los Angeles CA
David L. Ferguson - Beaconsfield, CA
Daniel Y. Chung - Fremont CA
Robert D. Patrie - Scotts Valley CA
Robert W. Wells - Cupertino CA
Robert O. Conn - Los Gatos CA

Assignee:

Xilinx, Inc. - San Jose CA

International Classification:

G04F 800

US Classification:

368113, 368118, 368120, 324617, 324763, 324765, 714733

Abstract:

A circuit measures the signal propagation delay through a selected test circuit. The test circuit is provided with a feedback path so that the test circuit and feedback path together form a free-running oscillator. The oscillator then automatically provides its own test signal that includes alternating rising and falling signal transitions on the test-circuit input node. A phase discriminator samples the output of the oscillator and accumulates data representing the signal propagation delay of either rising or falling signal transitions propagating through the test circuit. The worst-case delay associated with the test circuit can then be expressed as the longer of the two. Knowing the precise worst-case delay allows IC A designers to minimize the guard band and consequently guarantee higher speed performance.

US Patent:

7120728, Oct 10, 2006

Filed:

Jul 31, 2002

Appl. No.:

10/209694

Inventors:

Shahe H. Krakirian - Palo Alto CA, US
Richard A. Walter - San Jose CA, US
Subbaro Arumilli - Santa Clara CA, US
Cirillo Lino Costantino - Oakland CA, US
L. Vincent M. Isip - Cupertino CA, US
Subhojit Roy - Sunnyvale CA, US
Naveen S. Maveli - Sunnyvale CA, US
Daniel Ji Yong Park Chung - San Jose CA, US
Stephen D. Elstad - San Jose CA, US
Dennis H. Makishima - Mountainview CA, US
Daniel Y. Chung - San Ramon CA, US

Assignee:

Brocade Communications Systems, Inc. - San Jose CA

International Classification:

G06F 12/00

US Classification:

711 6, 711206, 709244, 709245, 709249, 370379, 370382, 370386, 370399, 370422

Abstract:

Placing virtualization agents in the switches which comprise the SAN fabric. Higher level virtualization management functions are provided in an external management server. Conventional HBAs can be utilized in the hosts and storage units. In a first embodiment, a series of HBAs are provided in the switch unit. The HBAs connect to bridge chips and memory controllers to place the frame information in dedicated memory. Routine translation of known destinations is done by the HBA, based on a virtualization table provided by a virtualization CPU. If a frame is not in the table, it is provided to the dedicated RAM. Analysis and manipulation of the frame headers is then done by the CPU, with a new entry being made in the HBA table and the modified frames then redirected by the HBA into the fabric. This can be done in either a standalone switch environment or in combination with other switching components located in a director level switch. In an alternative embodiment, specialized hardware scans incoming frames and detects the virtualized frames which need to be redirected.

US Patent:

7206314, Apr 17, 2007

Filed:

Jul 30, 2002

Appl. No.:

10/208377

Inventors:

Feejen Liao - Sunnyvale CA, US
Dennis Makishima - Mountain View CA, US
Howard Green - Carlsbad CA, US
Brian Forbes - Foster City CA, US
Daniel Chung - San Jose CA, US

Assignee:

Brocade Communications Systems, Inc. - San Jose CA

International Classification:

H04L 12/56

US Classification:

370401, 370466

Abstract:

A system and method for providing transparent communications between an Infiniband (IB) network and a Fibre Channel (FC) network are disclosed. One method comprises: (a) detecting FC node ports in the FC network; (b) creating virtual IB targets for each FC node port in the FC network; and (c) converting IB packets directed to the virtual IB targets into FC frames directed to the corresponding FC node port. It may further comprise intercepting management packets directed to the virtual IB targets and responsively emulating a subnet management agent (SMA) of the addressed virtual IB target. Another method comprises: (a) detecting IB channel adapters; (b) creating a virtual FC target for each IB channel adapter; and (c) converting any FC frames directed to the virtual FC targets into IB packets directed to the corresponding IB channel adapter. Fabric frames directed to the virtual FC targets may be intercepted and handled appropriately.

US Patent:

7236496, Jun 26, 2007

Filed:

Jul 30, 2002

Appl. No.:

10/208378

Inventors:

Daniel Chung - San Jose CA, US
Dennis Makishima - Mountain View CA, US
Brian Forbes - Foster City CA, US
Howard Green - Carlsbad CA, US
Vincent Guan - Saratoga CA, US
Grant Erickson - Sunnyvale CA, US

Assignee:

Brocade Communications Systems, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370401, 370466

Abstract:

An Inifiniband (IB) network that incorporates a Fibre Channel (FC) network is disclosed. The IB and FC networks are coupled by a gateway that maps the FC network to a virtual IB network. In generating the virtual IB network, the gateway may provide a virtual IB target for each node port in the FC network, and may further provide a minimum number of virtual IB switches necessary to support the virtual IB targets. The gateway assigns a globally unique identifier (GUID) to each of the virtual IB targets, and may further associate local identifiers (LID) with the virtual IB targets. The gateway preferably emulates subnet management agents (SMA) and general service agents (GSA) of the virtual IB targets when management IB packets are received, and the gateway preferably converts non-management IB packets directed to the virtual IB targets into FC frames directed to the corresponding target FC devices.

US Patent:

D548528, Aug 14, 2007

Filed:

Jul 17, 2006

Appl. No.:

29/263154

Inventors:

Jae Ho Cha - Woodstock GA, US
Randall S. Brown - Kennesaw GA, US
Michael Antonio Blanchet-Ruth - Chicago IL, US
Daniel Young-Doo Chung - Chicago IL, US

Assignee:

The Coca-Cola Company - Atlanta GA

International Classification:

0701

US Classification:

D 7523, D7509

US Patent:

D566557, Apr 15, 2008

Filed:

Aug 31, 2007

Appl. No.:

29/284133

Inventors:

Carie A. Davis - Atlanta GA, US
Scott C. Biondich - Alpharetta GA, US
Daniel Young-Doo Chung - Chicago IL, US
Michael Antonio Blanchet-Ruth - Chicago IL, US
Jereme Nathaniel Dumm - Oak Park IL, US

Assignee:

The Coca-Cola Company - Atlanta GA

International Classification:

0901

US Classification:

D 9500

US Patent:

D572140, Jul 1, 2008

Filed:

Jun 19, 2007

Appl. No.:

29/288669

Inventors:

Carie A. Davis - Atlanta GA, US
Scott C. Biondich - Alpharetta GA, US
Daniel Young-Doo Chung - Chicago IL, US
Michael Antonio Blanchet-Ruth - Chicago IL, US
Jereme Nathaniel Dumm - Oak Park IL, US

Assignee:

The Coca-Cola Company - Atlanta GA

International Classification:

0901

US Classification:

D 9551