Patents by Inventor Dan Shen
Dan Shen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9094856Abstract: Routing methods are provided for IP-based Iridium like LEO polar satellite constellation network for finding a Manhattan path between a source node and a destination node. The routing methods can include identification of congested inter satellite links (ISLs). By selecting and using uncongested alternative paths, an original routing process can be converted into sub-routing processes each in a small scale of a Manhattan path region. Quality of Service (QoS) requirements such as delays and jitters can be incorporated into the routing methods, which leads to efficient routing and enhanced QoS-performance over the satellite constellation network. The disclosed routing methods can be suitable for real-time routing/rerouting applications under dynamic network conditions.Type: GrantFiled: February 25, 2014Date of Patent: July 28, 2015Assignee: Intelligent Fusion Technology, Inc.Inventors: Xin Tian, Genshe Chen, Dan Shen, Khanh D. Pham, Erik Blasch
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Patent number: 8970258Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.Type: GrantFiled: March 14, 2013Date of Patent: March 3, 2015Assignee: Cirrus Logic, Inc.Inventors: Dan Shen, Johann Gaboriau, Lingli Zhang, Christian Larsen
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Publication number: 20140340158Abstract: Kickback current from a charge pump to a power management integrated circuit (PMIC) may be reduced by dissipating charge from fly and hold capacitors during mode transitions. A switch may be placed in series between the charge pump and the PMIC to disconnect the charge pump and prevent kickback current from reaching the PMIC. Further, additional loads, as switches, may be coupled to the charge pump outputs to dissipate charge from the fly and hold capacitors. Additionally, a closed feedback loop may be used to monitor and discharge excess charge from the fly and hold capacitors during mode transitions. Furthermore, charge may be redistributed between the fly and hold capacitors during mode transitions to reduce the time period of the transition.Type: ApplicationFiled: December 16, 2013Publication date: November 20, 2014Applicant: CIRRUS LOGIC, INC.Inventors: Bharath Kumar Thandri, Thuan L. Nguyen, Daniel John Allen, Lingli Zhang, Aniruddha Satoskar, Aaron Brennan, Dan Shen
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Systems and methods for edge control based on detecting current direction in a switched output stage
Patent number: 8872561Abstract: In accordance with these and other embodiments of the present disclosure, an apparatus and a method may include receiving a first input configured to indicate an output voltage of an output node of a switched output stage comprising a pull-down driver device coupled at its non-gate terminals between a ground voltage and the output node and a pull-up driver device coupled at its non-gate terminals between a supply voltage and the output node. The method may also include receiving a second input configured to indicate a gate voltage of a gate terminal of a first one of the pull-up driver device and the pull-down driver device. The method may further include detecting direction of an output current flowing into or out of the output node based on the first input and the second input.Type: GrantFiled: March 14, 2013Date of Patent: October 28, 2014Assignee: Cirrus Logic, Inc.Inventors: Dan Shen, Lingli Zhang, Johann Gaboriau -
Publication number: 20140294206Abstract: An asymmetric modulation scheme may be used to drive two output nodes coupled to a load. The asymmetric modulation scheme may be one-sided such that the switching rate of a first output node is lower than the switching rate of a second output node. The first output node may be switched only to change a direction of current between the first output node and the second output node, while the second output node is switched to convey the information of an input signal. The asymmetric modulation scheme may be used to drive a speaker to reduce noise at the first output node to improve accuracy of current monitoring through the speaker by a current monitor coupled at the first output node.Type: ApplicationFiled: August 13, 2013Publication date: October 2, 2014Applicant: CIRRUS LOGIC, INC.Inventors: Dan Shen, Frank Cheng, Lingli Zhang
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SYSTEMS AND METHODS FOR EDGE CONTROL BASED ON DETECTING CURRENT DIRECTION IN A SWITCHED OUTPUT STAGE
Publication number: 20140266310Abstract: In accordance with these and other embodiments of the present disclosure, an apparatus and a method may include receiving a first input configured to indicate an output voltage of an output node of a switched output stage comprising a pull-down driver device coupled at its non-gate terminals between a ground voltage and the output node and a pull-up driver device coupled at its non-gate terminals between a supply voltage and the output node. The method may also include receiving a second input configured to indicate a gate voltage of a gate terminal of a first one of the pull-up driver device and the pull-down driver device. The method may further include detecting direction of an output current flowing into or out of the output node based on the first input and the second input.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: CIRRUS LOGIC, INC.Inventors: Dan Shen, Lingli Zhang, Johann Gaboriau -
Publication number: 20140266126Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: CIRRUS LOGIC, INC.Inventors: Dan Shen, Johann Gaboriau, Lingli Zhang, Christian Larsen
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Publication number: 20140266109Abstract: In accordance with embodiments of the present disclosure, systems and methods may include an input configured to indicate a switching node voltage of a switching node of a power converter comprising a first switch device coupled at its non-gate terminals between a ground voltage and the switching node and a second switch device coupled at its non-gate terminals between an output supply node and the switching node. The systems and methods may also include a predriver circuit coupled to the input and a gate terminal of the first switch device, the predriver circuit configured to drive an input voltage signal to the gate terminal of the first switch device and configured to select an effective impedance of the gate terminal of the first switch device based on the input.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: CIRRUS LOGIC, INC.Inventors: Lingli Zhang, Dan Shen, Johann Gaboriau
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Publication number: 20140095408Abstract: One embodiment provides a system for recommending products. The system may include a search engine to retrieve, from a collection of product reviews, product review results using at least two input product names. The system may also include a template builder to build comparative sentence templates to define relationships between at least two product names, in which each comparative sentence template has a weight as a function of the defined relationship, and the search engine extracts one or more snippets matching at least one of the comparative sentence templates within each product review result. The system may further include a review ranking device to rank the product review search results based on the one or more extracted snippets, in which each snippet has a same weight as its matched comparative sentence template.Type: ApplicationFiled: December 9, 2013Publication date: April 3, 2014Applicant: EBAY INC.Inventors: Dan Shen, Shen Huang, Yongzheng Zhang, Catherine Baudin, Qiang Wang
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Publication number: 20140012863Abstract: Technique for topic extraction and opinion mining are described. For example, a document that is pertinent to a topic is selected based on searching, using a key phrase, a plurality of documents. A subtopic referenced in the document is identified. A feature of the subtopic is identified based on the document. A rating of the feature of the subtopic is determined based on the document. Using at least one processor, a sentiment of the document is determined based in part on the feature and the rating of the feature.Type: ApplicationFiled: September 6, 2013Publication date: January 9, 2014Applicant: eBay Inc.Inventors: Neelakantan Sundaresan, Yongzheng Zhang, Catherine Baudin, Dan Shen, Shen Huang
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Patent number: 8620906Abstract: One embodiment provides a system for recommending products. The system may include a search engine to retrieve, from a collection of product reviews, product review results using at least two input product names. The system may also include a template builder to build comparative sentence templates to define relationships between at least two product names, in which each comparative sentence template has a weight as a function of the defined relationship, and the search engine extracts one or more snippets matching at least one of the comparative sentence templates within each product review result. The system may further include a review ranking device to rank the product review search results based on the one or more extracted snippets, in which each snippet has a same weight as its matched comparative sentence template.Type: GrantFiled: November 6, 2009Date of Patent: December 31, 2013Assignee: eBay Inc.Inventors: Dan Shen, Shen Huang, Yongzheng Zhang, Catherine Baudin, Qiang Wang
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Patent number: 8533208Abstract: Methods, apparatus, and systems to determine a niche market of items or services, the first phase of which identifies a gap between demand and supply for a set of items. Session logs may be evaluated to compare transactions involving a specific item to those of a larger group of items. The resultant information identifies areas of high demand, but with low availability. The niche market information may be provided as direct merchandising items for sellers. In one example, the method generates niche market item web pages in specific categories. Additional methods, apparatus, and systems are disclosed.Type: GrantFiled: September 28, 2009Date of Patent: September 10, 2013Assignee: eBay Inc.Inventors: Neelakantan Sundaresan, Yongzheng Zhang, Catherine Baudin, Dan Shen, Shen Huang
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Publication number: 20130204730Abstract: One example embodiment relates to a method that comprises receiving marketplace listing information from a user, the marketplace listing information including a listing title, and accessing a plurality of character patterns for attracting attention to marketplace listings. The method includes analyzing, using one or more processors, the listing title to identify at least one of the plurality of character patterns in the listing title. A request for a new listing title is generated based on identifying at least one of the plurality of character patterns in the listing title.Type: ApplicationFiled: December 14, 2012Publication date: August 8, 2013Applicant: eBay Inc.Inventors: Johnson Wang, Shen Huang, Dan Shen
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Publication number: 20120197752Abstract: Systems and methods are disclosed to automatically publish data items associated with a news event. In one embodiment, a method comprises determining, using one or more processors, an event of a plurality of events as associated with a heightened user interest, identifying one or more listings from a plurality of listings as matching the event associated with the heightened user interest, and presenting a visual representation of a relationship between the event and the one or more listings such that the one or more listings are displayed as visually related to the event.Type: ApplicationFiled: April 5, 2012Publication date: August 2, 2012Applicant: eBay Inc.Inventors: Dan Shen, Xiaodi Zhang, Qiang Wang, Helen Hang Ye, Jin Yu Lou
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Patent number: 8176032Abstract: Systems and methods are disclosed to automatically publish data items associated with a news event. In one example embodiment, a method comprises monitoring search queries associated with a search query category, detecting a change in a search request frequency associated with the search query category with respect to a baseline frequency, determining an event associated with the search query category, identifying one or more data items associated with the event, and generating a visual representation of a relationship between the one or more data items and the event. The search query category may be associated with at least one search term a baseline frequency.Type: GrantFiled: October 22, 2009Date of Patent: May 8, 2012Assignee: eBay Inc.Inventors: Dan Shen, Xiaodi Zhang, Qiang Wang, Helen Hang Ye, Jin Yu Lou
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Patent number: 8093951Abstract: An audio switching power amplifier having an output pulse voltage selected in conformity with an indication of the output signal amplitude provides lower electromagnetic interference (EMI) in class-D amplifier implementations, in particular, in inductor-less designs. The output pulse voltage may be selected by providing multiple switching circuits, such as half or fully bridge switches, with each switching circuit connected to a different power supply. One of the switching circuits is activated by the switching controller, while the others are disabled, providing selection of the output pulse voltage. Selection of a lower pulse voltage, when the maximum voltage is not required, reduces the generated EMI. The switching frequency of the class-D amplifier may also be controlled in conformity with the output signal amplitude, so that at higher output levels a lower switching rate is selected, reducing the generated EMI.Type: GrantFiled: September 28, 2009Date of Patent: January 10, 2012Assignee: Cirrus Logic, Inc.Inventors: Lingli Zhang, Dan Shen, Johann Gaboriau, Eric J. Swanson
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Publication number: 20110246076Abstract: A method and system of conducting named entity recognition. One method comprises selecting one or more examples for human labelling, each example comprising a word sequence containing a named entity and its context; and retraining a model for the named entity recognition based on the labelled examples as training data.Type: ApplicationFiled: May 28, 2005Publication date: October 6, 2011Inventors: Jian Su, Dan Shen, Jie Zhang, Guo Dong Zhou
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Publication number: 20110113027Abstract: One embodiment provides a system for recommending products. The system may include a search engine to retrieve, from a collection of product reviews, product review results using at least two input product names. The system may also include a template builder to build comparative sentence templates to define relationships between at least two product names, in which each comparative sentence template has a weight as a function of the defined relationship, and the search engine extracts one or more snippets matching at least one of the comparative sentence templates within each product review result. The system may further include a review ranking device to rank the product review search results based on the one or more extracted snippets, in which each snippet has a same weight as its matched comparative sentence template.Type: ApplicationFiled: November 6, 2009Publication date: May 12, 2011Inventors: Dan Shen, Shen Huang, Yongzheng Zhang, Catherine Baudin, Olang Wang
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Publication number: 20110099201Abstract: Systems and methods are disclosed to automatically publish data items associated with a news event. In one example embodiment, a method comprises monitoring search queries associated with a search query category, detecting a change in a search request frequency associated with the search query category with respect to a baseline frequency, determining an event associated with the search query category, identifying one or more data items associated with the event, and generating a visual representation of a relationship between the one or more data items and the event. The search query category may be associated with at least one search term a baseline frequency.Type: ApplicationFiled: October 22, 2009Publication date: April 28, 2011Inventors: Dan Shen, Xiaodi Zhang, Qiang Wang, Helen Hang Ye, Vincent Jin Yu
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Publication number: 20110078167Abstract: Methods, apparatus, and systems to determine a niche market of items or services, the first phase of which identifies a gap between demand and supply for a set of items. Session logs may be evaluated to compare transactions involving a specific item to those of a larger group of items. The resultant information identifies areas of high demand, but with low availability. The niche market information may be provided as direct merchandising items for sellers. In one example, the method generates niche market item web pages in specific categories. Additional methods, apparatus, and systems are disclosed.Type: ApplicationFiled: September 28, 2009Publication date: March 31, 2011Inventors: Neelakantan Sundaresan, Yongzheng Zhang, Catherine Baudin, Dan Shen, Shen Huang