Xin Yuan Zhang

US Patent:

6818955, Nov 16, 2004

Filed:

Apr 9, 2003

Appl. No.:

10/412076

Inventors:

Choy Hing Li - Saratoga CA
Xin Yi Zhang - Palo Alto CA

Assignee:

Marvell International Ltd. - Hamilton

International Classification:

H01L 2362

US Classification:

257355, 257356, 257357, 257358, 257359, 257360, 257361, 257362

Abstract:

An electrostatic discharge device may provide better protection of an integrated circuit by more uniform breakdown of a plurality of finger regions. The plurality of finger regions may extend through a first region of a substrate having a first conductivity type and into a second region of the substrate more lightly doped with impurities of the first conductivity type. An electrostatic discharge device may include a collector region having a middle region that may be highly doped with impurities of the first conductivity type. The middle region may be proximate to a layer that is lightly doped with impurities of the first conductivity type and a layer that is doped with impurities of the second conductivity type. The collector region may decrease the breakdown voltage of the electrostatic discharge device.

US Patent:

6987301, Jan 17, 2006

Filed:

Apr 9, 2003

Appl. No.:

10/412099

Inventors:

Xin Yi Zhang - Palo Alto CA, US
Choy Hing Li - Saratoga CA, US

Assignee:

Marvell International Ltd. - Hamilton

International Classification:

H01L 23/62

US Classification:

257362, 257566

Abstract:

An electrostatic discharge device may provide better protection of an integrated circuit by more uniform breakdown of a plurality of finger regions. The plurality of finger regions may extend through a first region of a substrate having a first conductivity type and into a second region of the substrate more lightly doped with impurities of the first conductivity type. An electrostatic discharge device may include a collector region having a middle region that may be highly doped with impurities of the first conductivity type. The middle region may be proximate to a layer that is lightly doped with impurities of the first conductivity type and a layer that is doped with impurities of the second conductivity type. The collector region may decrease the breakdown voltage of the electrostatic discharge device.

US Patent:

8396204, Mar 12, 2013

Filed:

Oct 6, 2011

Appl. No.:

13/267231

Inventors:

Jose Luis Beltran Guerrero - Palo Alto CA, US
Xin Zhang - San Jose CA, US
Ivan Adrian Lopez Sanchez - Sonora, MX
Ming Hu - Toronto, CA
Shailendra K. Jain - Sunnyvale CA, US
Jerry Z. Shan - Palo Alto CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04M 3/00

US Classification:

37926501, 37926502, 37926511, 37926512, 37926513, 37926601

Abstract:

A method for determining call center resource allocation can include modeling call center performance over an operations time period using a computer. A number of replicas of the modeled call center performance are simulated, using the computer, over a planning time period, each replica having random contact arrivals and contact service times following a stochastic arrival and service process according to a probability distributions of inter-arrival time and service time. Multiple iterations of each simulation are run on the computer to optimize call center resource allocation. A particular simulation iteration is tested against a criterion of convergence, and call center resource is allocated based on the particular simulation iteration with a successful criterion of convergence.

US Patent:

8561074, Oct 15, 2013

Filed:

Nov 19, 2010

Appl. No.:

12/950887

Inventors:

Ludmila Cherkasova - Sunnyvale CA, US
Xin Zhang - San Jose CA, US
Xiaozhou Li - Cupertino CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F 9/46

US Classification:

718102, 718100, 718104, 718105

Abstract:

Systems and methods of enhanced backup job scheduling are disclosed. An example method may include determining a number of jobs (n) in a backup set, determining a number of tape drives (m) in the backup device, and determining a number of concurrent disk agents (maxDA) configured for each tape drive. The method may also include defining a scheduling problem based on n, m, and maxDA. The method may also include solving the scheduling problem using an integer programming (IP) formulation to derive a bin-packing schedule that minimizes makespan (S) for the backup set.

US Patent:

8643349, Feb 4, 2014

Filed:

Nov 9, 2009

Appl. No.:

12/614532

Inventors:

Gang Chen - Hong Kong, CN
Xin Zhang - San Jose CA, US
Weiyun Chen - Gilbert AZ, US

Assignee:

Semiconductor Components Industries, LLC - Phoenix AZ

International Classification:

G05F 1/00

US Classification:

323282

Abstract:

A power supply controller and method for improving the transient response of the power supply controller. The power supply controller includes a pulse width modulation control module connected to a feedback network. The feedback network is composed of an amplifier having an inverting input terminal, a non-inverting input terminal, and an output terminal. A compensation network is coupled between the inverting input terminal and the output terminal of the amplifier and a reference voltage is coupled to the non-inverting input terminal of the amplifier. A switch is coupled between the output terminal of the amplifier and an input terminal of the compensation network. The transient response of the controller is improved by operating the controller in a closed loop compensation configuration during a continuously pulsing operating mode and in an open loop compensation configuration during a pulse skip operating mode.

US Patent:

20060279350, Dec 14, 2006

Filed:

May 10, 2006

Appl. No.:

11/431103

Inventors:

Xin Zhang - Santa Clara CA, US
Qin Huang - Cary NC, US

International Classification:

H03K 17/00

US Classification:

327407000

Abstract:

An integrated circuit power device includes a monolithic voltage regulator channel for providing low voltage high current output. The devices can be installed in parallel without a master control IC and without limitations on the number of channels to support CPU power, or can be used alone to support regular Point of Load. Novel and effective control scheme and analog circuits are provided to implement the device, including a distributed current sharing and adaptive voltage position scheme, an automatic interleaving scheme with self-adjusted carrier generator, and a novel current sensing scheme with an accurate transconductance amplifier.

US Patent:

20110055000, Mar 3, 2011

Filed:

Aug 27, 2009

Appl. No.:

12/548429

Inventors:

Xin Zhang - San Jose CA, US
Zainab Jamal - Mountain View CA, US
Krishna Venkatraman - Palo Alto CA, US

International Classification:

G06Q 30/00
G06N 5/02
G06F 15/16

US Classification:

705 1443, 706 52, 709206

Abstract:

One embodiment is a method that predicts a probability of users responding to a second email campaign based on data gathered from a first email campaign. Data from the first email campaign is applied to different models to identify attributes that are predictive of users who responded to the first email campaign. These attributes are used to predict a probability of users responding to the second email campaign.

US Patent:

20110202382, Aug 18, 2011

Filed:

Oct 28, 2008

Appl. No.:

13/125725

Inventors:

Cipriano A. Santos - Modesto CA, US
Maria Teresa Gonzalez Diaz - Sunnyvale CA, US
Shailendra K. Jain - Sunnyvale CA, US
Xin Zhang - San Jose CA, US

International Classification:

G06Q 10/00

US Classification:

705 717

Abstract:

Systems, methods, and other embodiments associated with workforce planning. One example method includes receiving a project data associated with a project opportunity. The project data includes a probability data. The probability data describes the likelihood of a project opportunity being selected. The project data includes a workforce demand. The example method may also include establishing an objective function that is based, at least in part, on the project data, and a set of constraints. The objective function concerns a workforce allocation plan. The example method may also include minimizing a workforce cost by solving the objective function in light of the set of constraints. Solving the objective function includes optimizing a tradeoff between labor utilization and project demand fulfillment. The example method may also include providing the workforce allocation plan.