Yu Q Xu

7460040, Dec 2, 2008

May 29, 2007

11/754670

Thungoc M. Tran - San Jose CA, US
Yu Xu - Palo Alto CA, US
Kwong-Wen Wei - Sunnyvale CA, US

Altera Corporation - San Jose CA

H03M 9/00

341100, 375354

A high-speed serial interface for a programmable logic device includes a plurality of features to handle the various issues that may arise with data rates over 1 Gbps and particularly over 1. 25 Gbps. Those features may include dynamic phase alignment to control clock-data skew, data realignment (e. g. , bit slip circuitry) to account for channel-to-channel skew, full-duplex serializer and deserializer, out-of-range frequency support for low frequencies, and a soft-CDR mode.

7555667, Jun 30, 2009

Jul 17, 2006

11/488365

Ali Burney - Fremont CA, US
Yu Xu - Palo Alto CA, US
Leon Zheng - Santa Clara CA, US
Sanjay K. Charagulla - San Jose CA, US

Altera Corporation - San Jose CA

G06F 1/04
G06F 1/06

713401, 713501, 713503

Adjustable transceiver circuitry is provided for programmable integrated circuits. The transceiver circuitry has a dynamic phase alignment circuit that can be used for aligning clock and data signals. The transceiver circuitry supports a phase-locked-loop source synchronous mode that can be used to receive data from transmitting integrated circuits that are clocked with a common clock. Each transmitting integrated circuit transmits a clock and associated data signals over a bus. The transceiver circuitry uses a master-slave architecture. A master dynamic phase alignment circuit in each transceiver receives the clock for that bus and selects a corresponding optimal clock phase to use in receiving input data for the bus from a multiphase clock. The master dynamic phase alignment circuit in each transceiver distributes the optimal clock phase to associated slave dynamic phase alignment circuits. Only a single phase-locked loop circuit is need to generate the multiphase clock.

8253451, Aug 28, 2012

Jun 16, 2010

12/817126

Cheng Hsiang Hsieh - Los Gatos CA, US
Mengchi Liu - Fremont CA, US
Yu Xu - Palo Alto CA, US

Xilinx, Inc. - San Jose CA

H03L 7/00

327141, 327157, 327161

A clock data recovery module and a method of operation thereof are described. In an embodiment, a data stream is received. Transitions in the data stream are detected to provide phase signaling for indicating phase relationships to the transitions detected. A lock detector receives the phase signaling. The lock detector accumulates phase information from the phase signaling and temporarily stores an accumulated total of the phase information representative of a code change, and the lock detector determines whether the code change is within a set range over a time period and resets the accumulated total at a conclusion of the time period.

8549006, Oct 1, 2013

Mar 4, 2008

12/042287

Sihem Amer-Yahia - New York NY, US
Maria F. Fernandez - Madison NJ, US
Divesh Srivastava - Summit NJ, US
Yu Xu - La Jolla CA, US

AT&T Intellectual Property I, L.P. - Atlanta GA

G06F 7/00

707741

A method of searching a document having nested-structure document-specific markup (such as Extensible Markup Language (XML)) involves receiving a query that designates at least (A) a phrase to be matched in a phrase matching process, and (B) a selective designation of at least a tag or annotation that is to be ignored during the phrase matching process. The method further involves deriving query-specific indices based on query-independent indices that were created specific to each document, and carrying out the phrase matching process using the query-specific indices on the document having the nested-structure document-specific markup.

8566847, Oct 22, 2013

Mar 11, 2011

13/046449

Robert Ling - San Jose CA, US
Yu Xu - Folsom CA, US
Sunil A. Bhagia - Olympia WA, US

Cisco Technology, Inc. - San Jose CA

G06F 9/44

719328, 719318, 719323, 710 22, 710 26, 710301, 709203, 709217, 709221

Techniques presented herein provide approaches for out-of-band host management via a management controller. In one embodiment, the management controller provides an application programming interface (API) specifying one or more functions for managing one or more applications executing on a host computer. The one or more functions may be invoked by a requesting entity.

20130173589, Jul 4, 2013

Dec 29, 2011

13/340300

Yu Xu - Burlingame CA, US
Ahmad Said Ghazal - Redondo Beach CA, US

G06F 17/30

707714, 707E17017

Techniques for optimizing outer joins in database operations are provided. In an embodiment, a query having an outer join with a GROUP BY clause is rewritten and expanded to expand a first level partition of that GROUP BY clause to produce a modified query. In another situation, rows associated with processing a query are each row split and then hashed based at least in part on attributes of the outer join predicate. A left outer join is performed and a global aggregation processed to produce a spooled table to process the query.

20130173594, Jul 4, 2013

Dec 29, 2011

13/340324

Yu Xu - Burlingame CA, US
Olli Pekka Kostamaa - Santa Monica CA, US

G06F 17/30

707722, 707E17014, 707E17046, 707E17005

Techniques for accessing a parallel database system via an external program using vertical and/or horizontal partitioning are provided. An external program to a database management system (DBMS) configures external mappers to process a specific portion of query results on specific access module processors of the DBMS that are to house query results. The query is submitted by the external program to the DBMS and the DBMS is directed to organize the query results in a vertical or horizontal manner. Each external mapper accesses its portion of the query results for processing in parallel on its designated AMP or set of AMPS to process the query results.

20130173595, Jul 4, 2013

Dec 29, 2011

13/340357

Yu Xu - Burlingame CA, US
Olli Pekka Kostamaa - Santa Monica CA, US

G06F 17/30

707722, 707E1701, 707E17014

Techniques for external application-directed data partitioning in data exported from a parallel database management system (DBMS) are provided. An external application sends a query, a total number of requested access module processors (AMPs), and an application-defined data partitioning expression to the DBMS. The DBMS executes the query with the results vertical partitioned on the identified number of AMPs. Individual external mappers access their assigned AMPs asking for specific partitions that they are assigned to process the query results.