Patents by Inventor Wenbo Liang
Wenbo Liang 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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Publication number: 20240136938Abstract: An AC-DC converter includes an AC voltage source, a rectifier, and a rectifier control circuit. The rectifier includes a field effect transistor (FET) having a source, a drain, and a gate. The drain of the FET is coupled to the AC voltage source, and the source is coupled to ground. The rectifier control circuit is coupled to the gate of the FET. The rectifier control circuit is configured to provide a ramp voltage to regulate the FET after the AC voltage source is turned off.Type: ApplicationFiled: October 20, 2022Publication date: April 25, 2024Inventors: Wenbo LIANG, Edward Er DENG, Ying LI, San Hwa CHEE
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Publication number: 20220152051Abstract: The present invention relates to a use of a chemical drug in the field of medicine, and relates in particular to an application of glycocholic acid in the preparation of anti-tumor drugs. Provided by the present invention is a new application field for glycocholic acid, wherein glycocholic acid can be used in the preparation of anti-tumor drugs; the main applicable tumors comprise breast cancer, ovarian cancer, endometrial cancer, or a combination thereof; and glycocholic acid is used as an effective active ingredient in anti-tumor drugs. The present invention is beneficial in developing new anti-tumor drugs.Type: ApplicationFiled: March 15, 2019Publication date: May 19, 2022Inventors: Wenbo LIANG, Rongrong XIANG, Yiming JIANG, Yuchun TONG, Jie SONG
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Patent number: 11270896Abstract: Provided are methods and apparatus for ultraviolet (UV) assisted capillary condensation to form dielectric materials. In some embodiments, a UV driven reaction facilitates photo-polymerization of a liquid phase flowable material. Applications include high quality gap fill in high aspect ratio structures and pore sealing of a porous solid dielectric film. According to various embodiments, single station and multi-station chambers configured for capillary condensation and UV exposure are provided.Type: GrantFiled: July 11, 2019Date of Patent: March 8, 2022Assignee: Lam Research CorporationInventors: Jonathan D. Mohn, Nicholas Muga Ndiege, Patrick A. van Cleemput, David Fang Wei Chen, Wenbo Liang, Shawn M. Hamilton
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Patent number: 10797610Abstract: A synchronous rectifier controller method is provided for controlling the on and off periods of a synchronous rectifier (SR) switch transistor in a switching power converter. The method includes a first step of monitoring an unfiltered to control whether the SR switch transistor is turned on during a first part of a power switch cycle. The method also includes a second step of monitoring a filtered SR switch signal to control whether the SR switch is turned on during a remaining second part of the power switch cycle.Type: GrantFiled: September 3, 2019Date of Patent: October 6, 2020Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Pengju Kong, Tao Li, Hien Bui, Wenbo Liang, Hanguang Zhang
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Publication number: 20190393797Abstract: A synchronous rectifier controller for controlling the on and off periods of a synchronous rectifier switch transistor in a switching power converter. In particular, the synchronous rectifier controller is configured to adaptively enable and disable a deglitch filter for filtering a turn-on signal for the synchronous rectifier switch transistor. In this fashion, the synchronous rectifier switch transistor may be switched on more rapidly during periods when the deglitch filter is disabled for greater efficiency yet the switching power converter is protected by the deglitch filter when it is not disabled.Type: ApplicationFiled: September 3, 2019Publication date: December 26, 2019Inventors: Pengju Kong, Tao LI, Hien BUI, Wenbo LIANG, Hanguang ZHANG
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Publication number: 20190333790Abstract: Provided are methods and apparatus for ultraviolet (UV) assisted capillary condensation to form dielectric materials. In some embodiments, a UV driven reaction facilitates photo-polymerization of a liquid phase flowable material. Applications include high quality gap fill in high aspect ratio structures and por sealing of a porous solid dielectric film. According to various embodiments, single station and multi-station chambers configured for capillary condensation and UV exposure are provided.Type: ApplicationFiled: July 11, 2019Publication date: October 31, 2019Inventors: Jonathan D. Mohn, Nicholas Muga Ndiege, Patrick A. van Cleemput, David Fang Wei Chen, Wenbo Liang, Shawn M. Hamilton
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Patent number: 10418911Abstract: A synchronous rectifier controller for controlling the on and off periods of a synchronous rectifier switch transistor in a switching power converter. In particular, the synchronous rectifier controller is configured to adaptively enable and disable a deglitch filter for filtering a turn-on signal for the synchronous rectifier switch transistor. In this fashion, the synchronous rectifier switch transistor may be switched on more rapidly during periods when the deglitch filter is disabled for greater efficiency yet the switching power converter is protected by the deglitch filter when it is not disabled.Type: GrantFiled: August 28, 2018Date of Patent: September 17, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Pengju Kong, Tao Li, Hien Bui, Wenbo Liang, Hanguang Zhang
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Patent number: 10388546Abstract: Provided are methods and apparatus for ultraviolet (UV) assisted capillary condensation to form dielectric materials. In some embodiments, a UV driven reaction facilitates photo-polymerization of a liquid phase flowable material. Applications include high quality gap fill in high aspect ratio structures and por sealing of a porous solid dielectric film. According to various embodiments, single station and multi-station chambers configured for capillary condensation and UV exposure are provided.Type: GrantFiled: November 16, 2015Date of Patent: August 20, 2019Assignee: Lam Research CorporationInventors: Jonathan D. Mohn, Nicholas Muga Ndiege, Patrick A. Van Cleemput, David Fang Wei Chen, Wenbo Liang, Shawn M. Hamilton
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Patent number: 10199951Abstract: A flyback converter is provided with a synchronous rectifier (SR) controller including a pulse linear regulator (PLR) charging path and an LDO charging path. The SR controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the PLR and LDO charging paths.Type: GrantFiled: April 3, 2018Date of Patent: February 5, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Pengju Kong, Xiaye Wang, Wenbo Liang, Jianming Yao
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Publication number: 20190006950Abstract: A synchronous rectifier controller for controlling the on and off periods of a synchronous rectifier switch transistor in a switching power converter. In particular, the synchronous rectifier controller is configured to adaptively enable and disable a deglitch filter for filtering a turn-on signal for the synchronous rectifier switch transistor. In this fashion, the synchronous rectifier switch transistor may be switched on more rapidly during periods when the deglitch filter is disabled for greater efficiency yet the switching power converter is protected by the deglitch filter when it is not disabled.Type: ApplicationFiled: August 28, 2018Publication date: January 3, 2019Inventors: Pengju Kong, Tao Li, Hien Bui, Wenbo Liang, Hanguang Zhang
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Patent number: 10063159Abstract: A synchronous rectifier controller for controlling the on and off periods of a synchronous rectifier switch transistor in a switching power converter. In particular, the synchronous rectifier controller is configured to adaptively enable and disable a deglitch filter for filtering a turn-on signal for the synchronous rectifier switch transistor. In this fashion, the synchronous rectifier switch transistor may be switched on more rapidly during periods when the deglitch filter is disabled for greater efficiency yet the switching power converter is protected by the deglitch filter when it is not disabled.Type: GrantFiled: June 30, 2017Date of Patent: August 28, 2018Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Pengju Kong, Tao Li, Hien Bui, Wenbo Liang, Hanguang Zhang
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Publication number: 20180226897Abstract: A flyback converter is provided with a synchronous rectifier (SR) controller including a pulse linear regulator (PLR) charging path and an LDO charging path. The SR controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the PLR and LDO charging paths.Type: ApplicationFiled: April 3, 2018Publication date: August 9, 2018Inventors: Pengju Kong, Xiaye Wang, Wenbo Liang, Jianming Yao
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Patent number: 9935559Abstract: A flyback converter is provided with a synchronous rectifier (SR) controller including a pulse linear regulator (PLR) charging path and an LDO charging path. The SR controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the PLR and LDO charging paths.Type: GrantFiled: August 25, 2016Date of Patent: April 3, 2018Assignee: DIALOG SEMICONDUCTORS INC.Inventors: Pengju Kong, Xiaye Wang, Wenbo Liang, Jianming Yao
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Publication number: 20180062530Abstract: A flyback converter is provided with a synchronous rectifier (SR) controller including a pulse linear regulator (PLR) charging path and an LDO charging path. The SR controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the PLR and LDO charging paths.Type: ApplicationFiled: August 25, 2016Publication date: March 1, 2018Inventors: Pengju Kong, Xiaye Wang, Wenbo Liang, Jianming Yao
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Patent number: 9906151Abstract: A switching power converter may include a power switch coupled to a primary winding of a transformer, and a primary controller configured to turn on and off the power switch, a synchronous rectifier switch coupled to a secondary winding of a transformer, and a synchronous rectifier controller configured to turn on and off the synchronous rectifier switch. The synchronous rectifier controller may monitor a voltage across the synchronous rectifier switch. The synchronous rectifier controller may detect a fault condition responsive to the voltage reaching a turn-off voltage threshold before a minimum on-time timer expires. The synchronous rectifier controller may detect a fault condition responsive to the synchronous rectifier switch being turned off at the same time, immediately after, or within a timing guardband after the minimum on-time timer expires. The synchronous rectifier controller may adaptively increase a minimum off-time period for the synchronous rectifier switch.Type: GrantFiled: August 25, 2015Date of Patent: February 27, 2018Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Pengju Kong, Wenbo Liang
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Patent number: 9706610Abstract: A circuit for driving light emitting elements, such as LEDs, includes a first transistor having a source coupled to ground through a first resistive element, and a second transistor having a gate electrically coupled to a gate of the first transistor, a source electrically coupled to ground, and a drain for electrical connection to a first group of light emitting elements. The circuit also includes circuitry to provide a predetermined voltage at the source of the first transistor, circuitry to compensate for a difference in respective gate-source voltages of the first and second transistors, and circuitry to compensate for a difference in respective drain-source voltages of the first and second transistors. In some implementations, the circuit can achieve relatively low power consumption.Type: GrantFiled: October 18, 2011Date of Patent: July 11, 2017Assignee: Atmel CorporationInventors: Sean S. Chen, Wenbo Liang
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Publication number: 20170137943Abstract: Provided are methods and apparatus for ultraviolet (UV) assisted capillary condensation to form dielectric materials. In some embodiments, a UV driven reaction facilitates photo-polymerization of a liquid phase flowable material. Applications include high quality gap fill in high aspect ratio structures and por sealing of a porous solid dielectric film. According to various embodiments, single station and multi-station chambers configured for capillary condensation and UV exposure are provided.Type: ApplicationFiled: November 16, 2015Publication date: May 18, 2017Inventors: Jonathan D. Mohn, Nicholas Muga Ndiege, Patrick A. Van Cleemput, David Fang Wei Chen, Wenbo Liang, Shawn M. Hamilton
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Publication number: 20170063246Abstract: A switching power converter may include a power switch coupled to a primary winding of a transformer, and a primary controller configured to turn on and off the power switch, a synchronous rectifier switch coupled to a secondary winding of a transformer, and a synchronous rectifier controller configured to turn on and off the synchronous rectifier switch. The synchronous rectifier controller may monitor a voltage across the synchronous rectifier switch. The synchronous rectifier controller may detect a fault condition responsive to the voltage reaching a turn-off voltage threshold before a minimum on-time timer expires. The synchronous rectifier controller may detect a fault condition responsive to the synchronous rectifier switch being turned off at the same time, immediately after, or within a timing guardband after the minimum on-time timer expires. The synchronous rectifier controller may adaptively increase a minimum off-time period for the synchronous rectifier switch.Type: ApplicationFiled: August 25, 2015Publication date: March 2, 2017Inventors: Pengju Kong, Wenbo Liang
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Patent number: 9306446Abstract: A fault protection and correction circuit for the control of a power converter is disclosed. An example circuit generates a waveform that drives a switch on or off and controls the power converter. The controller circuit in addition to power factor correction (PFC) circuitry includes a first and a second shut down mode modules, both of them cause the switching to stop. The circuit includes a module for receiving fault events. When a fault occurs, the controller enters the second shut down mode. The controller stays in the second shut down mode if the required current for this mode can be provided by the outside circuitry. Otherwise, the controller enters the first shut down mode that requires less current and subsequently restarts the controller. By modifying the outside circuitry the controller can respond differently to fault events.Type: GrantFiled: December 7, 2012Date of Patent: April 5, 2016Assignee: Atmel CorporationInventors: Hong Zhang, Sean Chen, Dilip Sangam, Wenbo Liang
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Patent number: 9288852Abstract: A circuit for driving light emitting elements, such as LEDs, includes a first transistor having a source coupled to ground through a first resistive element, and a second transistor having a gate electrically coupled to a gate of the first transistor, a source electrically coupled to ground, and a drain for electrical connection to a first group of light emitting elements. The circuit also includes circuitry to provide a predetermined voltage at the source of the first transistor, circuitry to compensate for a difference in respective gate-source voltages of the first and second transistors, and circuitry to compensate for a difference in respective drain-source voltages of the first and second transistors. In some implementations, the circuit can achieve relatively low power consumption.Type: GrantFiled: March 7, 2012Date of Patent: March 15, 2016Assignee: Atmel CorporationInventors: Sean S. Chen, Wenbo Liang