Patents by Inventor Jianhong Xiao
Jianhong Xiao 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: 12204067Abstract: An automatic recognition method for a dry quasi-stationary front in Kunming, Yunnan, China is provided. The automatic recognition method includes: reading data; calculating, by a differential method, a temperature lapse rate between each layer of each point from a ground surface to 650 hPa, and acquiring a maximum inversion trend value; acquiring an initially selected inversion distribution based on the maximum inversion trend value; removing a nighttime clear sky radiation inversion, retaining only a frontal inversion, and binarizing (0, 1); finding a boundary between inversion and non-inversion; removing the abnormal candidate frontal points, and acquiring frontal nodes; removing meso- and micro-scale systems; and performing one-dimensional Gaussian filtering on longitude data of the frontal nodes, and connecting the filtered frontal nodes to acquire a quasi-stationary front in Kunming, Yunnan, China.Type: GrantFiled: March 12, 2024Date of Patent: January 21, 2025Assignee: Chengdu University of Information TechnologyInventors: Wendong Hu, Yongkai Zhang, Hongping Shu, Yanqiong Hao, Tiangui Xiao, Yan Chen, Fei Luo, Jianhong Gan, Ying Zhang, Xiaohang Wen, Taisong Xiong, Jian Shao, Wenjie Zhou, Balin Xu, Huahong Li, Yixue Deng, Jingyi Tao
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Patent number: 9614575Abstract: A method and apparatus is disclosed to couple a transmission amplifier and a reception amplifier to a shared medium. An output of the transmission amplifier is directly coupled to an input of the reception amplifier to form a common connection. The transmission amplifier and the reception amplifier may receive a first amplifier bias via the common connection. In response to the first amplifier bias, the transmission amplifier provides a first communication signal to the shared medium and the reception amplifier does not provide a second communication signal from the shared medium. Alternatively, the transmission amplifier and the reception may receive a second amplifier bias via the common connection. In response to the second amplifier bias, the reception amplifier provides the second communication signal from the shared medium and the transmission amplifier does not provide the first communication signal to the shared medium.Type: GrantFiled: April 23, 2009Date of Patent: April 4, 2017Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Ramon Gomez, Giuseppe Cusmai, Jianhong Xiao, Takayuki Hayashi, Young Shin
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Patent number: 9118367Abstract: Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of RF transmitters for high transmission power applications. In an embodiment, the common-emitter/source PA of conventional topologies is replaced with a current-input common-base/gate PA, which is stacked on top on an open-collector/drain current-output transmitter. The common-base/gate PA protects the output of the transmitter from large output voltage swings. The low input impedance of the common-base/gate PA makes the PA less susceptible to frequency roll-off, even in the presence of large parasitic capacitance produced by the transmitter. At the same time, the low input impedance of the common-base/gate PA reduces the voltage swing at the transmitter output and prevents the transmitter output from being compressed or modulated. In an embodiment, the DC output current of the transmitter is reused to bias the PA, which results in power savings compared to conventional transmitter topologies.Type: GrantFiled: March 22, 2013Date of Patent: August 25, 2015Assignee: Broadcom CorporationInventors: Ray (Ramon) Gomez, Leonard Dauphinee, Massimo Brandolini, Jianhong Xiao, Dongsoo Koh, Young Shin, Chonghua Zhong, Reza Rahman Khan
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Publication number: 20130235953Abstract: Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of RF transmitters for high transmission power applications. In an embodiment, the common-emitter/source PA of conventional topologies is replaced with a current-input common-base/gate PA, which is stacked on top on an open-collector/drain current-output transmitter. The common-base/gate PA protects the output of the transmitter from large output voltage swings. The low input impedance of the common-base/gate PA makes the PA less susceptible to frequency roll-off, even in the presence of large parasitic capacitance produced by the transmitter. At the same time, the low input impedance of the common-base/gate PA reduces the voltage swing at the transmitter output and prevents the transmitter output from being compressed or modulated, In an embodiment, the DC output current of the transmitter is reused to bias the PA, which results in power savings compared to conventional transmitter topologies.Type: ApplicationFiled: March 22, 2013Publication date: September 12, 2013Applicant: Broadcom CorporationInventors: Ray (Ramon) GOMEZ, Leonard Dauphinee, Massimo Brandolini, Jianhong Xiao, Dongsoo Koh, Young Shin, Chonghua Zhong, Reza Rahman Khan
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Patent number: 8417200Abstract: Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of RF transmitters for high transmission power applications. In an embodiment, the common-emitter/source PA of conventional topologies is replaced with a current-input common-base/gate PA, which is stacked on top on an open-collector/drain current-output transmitter. The common-base/gate PA protects the output of the transmitter from large output voltage swings. The low input impedance of the common-base/gate PA makes the PA less susceptible to frequency roll-off, even in the presence of large parasitic capacitance produced by the transmitter. At the same time, the low input impedance of the common-base/gate PA reduces the voltage swing at the transmitter output and prevents the transmitter output from being compressed or modulated. In an embodiment, the DC output current of the transmitter is reused to bias the PA, which results in power savings compared to conventional transmitter topologies.Type: GrantFiled: September 30, 2011Date of Patent: April 9, 2013Assignee: Broadcom CorporationInventors: Ray (Ramon) Gomez, Leonard Dauphinee, Massimo Brandolini, Jianhong Xiao, Dongsoo Koh, Young Shin, Chonghua Zhong, Rezaur Rahman Khan
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Publication number: 20130084816Abstract: Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of RF transmitters for high transmission power applications. In an embodiment, the common-emitter/source PA of conventional topologies is replaced with a current-input common-base/gate PA, which is stacked on top on an open-collector/drain current-output transmitter. The common-base/gate PA protects the output of the transmitter from large output voltage swings. The low input impedance of the common-base/gate PA makes the PA less susceptible to frequency roll-off, even in the presence of large parasitic capacitance produced by the transmitter. At the same time, the low input impedance of the common-base/gate PA reduces the voltage swing at the transmitter output and prevents the transmitter output from being compressed or modulated. In an embodiment, the DC output current of the transmitter is reused to bias the PA, which results in power savings compared to conventional transmitter topologies.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Applicant: Broadcom CorporationInventors: Ray (Ramon) Gomez, Leonard Dauphinee, Massimo Brandolini, Jianhong Xiao, Dongsoo Koh, Young Shin, Chonghua Zhong, Rezaur Rahman Khan
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Patent number: 8198939Abstract: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain profile accuracy, including methods and systems to reduce the effects of temperature and/or process variations on the gain profile of an amplifier.Type: GrantFiled: August 16, 2011Date of Patent: June 12, 2012Assignee: Broadcom CorporationInventors: Ramon Gomez, Jianhong Xiao, Takayuki Hayashi
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Publication number: 20110298542Abstract: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain profile accuracy, including methods and systems to reduce the effects of temperature and/or process variations on the gain profile of an amplifier.Type: ApplicationFiled: August 16, 2011Publication date: December 8, 2011Applicant: Broadcom CorporationInventors: Ramon GOMEZ, Jianhong XIAO, Takayuki HAYASHI
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Patent number: 8022755Abstract: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain profile accuracy, including methods and systems to reduce the effects of temperature and/or process variations on the gain profile of an amplifier.Type: GrantFiled: August 13, 2010Date of Patent: September 20, 2011Assignee: Broadcom CorporationInventors: Ramon Gomez, Jianhong Xiao, Takayuki Hayashi
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Publication number: 20100308918Abstract: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain profile accuracy, including methods and systems to reduce the effects of temperature and/or process variations on the gain profile of an amplifier.Type: ApplicationFiled: August 13, 2010Publication date: December 9, 2010Applicant: Broadcom CorporationInventors: Ramon Gomez, Jianhong Xiao, Takayuki Hayashi
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Patent number: 7804356Abstract: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain profile accuracy, including methods and systems to reduce the effects of temperature and/or process variations on the gain profile of an amplifier.Type: GrantFiled: July 14, 2008Date of Patent: September 28, 2010Assignee: Broadcom CorporationInventors: Ramon Gomez, Jianhong Xiao, Takayuki Hayashi
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Publication number: 20100197244Abstract: A method and apparatus is disclosed to couple a transmission amplifier and a reception amplifier to a shared medium. An output of the transmission amplifier is directly coupled to an input of the reception amplifier to form a common connection. The transmission amplifier and the reception amplifier may receive a first amplifier bias via the common connection. In response to the first amplifier bias, the transmission amplifier provides a first communication signal to the shared medium and the reception amplifier does not provide a second communication signal from the shared medium. Alternatively, the transmission amplifier and the reception may receive a second amplifier bias via the common connection. In response to the second amplifier bias, the reception amplifier provides the second communication signal from the shared medium and the transmission amplifier does not provide the first communication signal to the shared medium.Type: ApplicationFiled: April 23, 2009Publication date: August 5, 2010Applicant: Broadcom CorporationInventors: Ramon Gomez, Giuseppe Cusmai, Jianhong Xiao, Takayuki Hayashi, Young Shin
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Publication number: 20090261899Abstract: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain profile accuracy, including methods and systems to reduce the effects of temperature and/or process variations on the gain profile of an amplifier.Type: ApplicationFiled: July 14, 2008Publication date: October 22, 2009Applicant: Broadcom CorporationInventors: Ramon Gomez, Jianhong Xiao, Takayuki Hayashi
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Patent number: D1049798Type: GrantFiled: July 12, 2024Date of Patent: November 5, 2024Assignee: FUJIAN EASTWEST LIFEWIT TECHNOLOGY CO., LTD.Inventor: Jianhong Xiao