Patents by Inventor Xiao FEI

Xiao FEI 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).

  • Patent number: 8193854
    Abstract: A bandgap reference circuit has trimming-up resistors and trimming-down resistors for bi-directional trimming. PNP transistors have base and collectors grounded and emitters connected to parallel resistors. A difference resistor drives an inverting input of an op amp that drives a transistor that generates the bandgap reference voltage Vbg. A sensing resistor connects Vbg to a splitting node that connects to the non-inverting input through a first parallel resistor. The splitting node also connects through a second parallel resistor to the inverting input. Fuses or switches enable the trimming-up and trimming-down resistors. The trimming-up resistors are in series with the sensing resistor and the trimming-down resistors are in series with an output resistor that connects Vbg to reference voltage Vref. The circuit can be designed for a more typical process since bi-directional trimming allows Vref to be raised or lowered. Many circuits need no trimming when targeted for the typical process.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: June 5, 2012
    Assignee: Hong Kong Applied Science and Technology Research Institute Company, Ltd.
    Inventors: Xiao Fei Kuang, Kam Chuen Wan, Kwai Chi Chan, Yat To (William) Wong, Kwok Kuen (David) Kwong
  • Publication number: 20120124242
    Abstract: In a method for testing a preboot execution environment (PXE) function of a NIC of a server, an IP address is allocated for the NIC by sending a DHCP offer message to the NIC in response to receiving a DHCP discover message from the NIC. TFTP parameters are provided to the NIC by sending a DHCP ACK message to the NIC in response to receiving a DHCP request message from the NIC. A connection based on a MTFTP or a TFTP between the BMC and the NIC is established according to the TFTP parameters. A PXE image file is provided to the NIC for downloading through the connection in response to receiving a request for downloading the PXE image file from the NIC, and the downloaded PXE image file is executed to test whether the PXE function of the NIC is normal.
    Type: Application
    Filed: July 28, 2011
    Publication date: May 17, 2012
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY(Shenzhen) CO., LTD.
    Inventors: XIAO-FEI CHEN, JUN-MIN CHEN, ZHI-JIAN LONG, LE LIN, MING-XIANG HU
  • Publication number: 20120102309
    Abstract: A preboot execution environment (PXE) test device includes a microprocessor, one or more indicators, a network interface, a power connector, and a storage device. The network interface connects the PXE test device with a computer. The power connector connects an external power source to supply a voltage to the PXE test device. The storage device stores a boot loader, an embedded operating system, and one or more programs. The microprocessor executes the boot loader and the embedded operating system to start the PXE test device. The one or more indicators indicate a power supply status and a starting status of the PXE test device. The microprocessor further executes the one or more programs to remotely boot the computer for test PXE of a network card in the computer.
    Type: Application
    Filed: March 16, 2011
    Publication date: April 26, 2012
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
    Inventors: LE LIN, MING-SHIU OU YANG, JUN-MIN CHEN, MING-XIANG HU, XIAO-FEI CHEN, ZHI-JIAN LONG
  • Publication number: 20120095717
    Abstract: In a system and method for testing a serial port of a computing device, the serial port electronically connects to a test fixture. Test data is sent to a receive data (RXD) pin by a transmit data (TXD) pin. A test result is received from the serial port by the RXD pin. The TXD pin and the RXD pin work normally if the test data is identical to the test result. When voltages of a request to send (RTS) pin and a data terminal ready (DTR) pin are set at high level, the RTS pin, a data carrier detect (DCD) pin, the DTR pin, a ring indicator (RI) pin, a data send ready (DSR) pin and a clear to send (CTS) pin work normally, upon the condition that status values of the serial port indicate the voltages of the above six pins are at high level.
    Type: Application
    Filed: August 15, 2011
    Publication date: April 19, 2012
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
    Inventors: ZHI-JIAN LONG, MING-XIANG HU, JUN-MIN CHEN, LE LIN, XIAO-FEI CHEN
  • Publication number: 20120055356
    Abstract: A method for screen printing a printed circuit board substrate comprises the following steps. A printed circuit board substrate including a copper foil layer is provided. Pluralities of marks are formed on the copper foil layer. A plurality of printing screens are provided, each includes an screen pattern and an opening corresponding to a respective mark. Printing material is applied on the ith screen Si to form an ith printing pattern and cover the ith mark at the ith opening, the ith printing pattern conforms to the ith screen pattern; checking whether the ith mark is covered by the printing material when i is less than N. Printing material is applied on the (i+1)th screen Si+1 so as to form an (i+1)th printing pattern on the copper foil layer and covers the (i+1)th Mark Mi+1 at the (i+1)th opening, if the ith mark is covered by the printing material.
    Type: Application
    Filed: June 29, 2011
    Publication date: March 8, 2012
    Applicants: FOXCONN ADVANCED TECHNOLOGY INC., FUKUI PRECISION COMPONENT (SHENZHEN) CO., LTD.
    Inventor: XIAO-FEI ZHENG
  • Publication number: 20110271123
    Abstract: A method controls power of a baseboard management controller (BMC). A power control signal of the BMC is generated for powering up or powering down the BMC. An enabling signal is generated according to the power control signal. A power supply device is directed to output one or more voltages to the BMC.
    Type: Application
    Filed: March 9, 2011
    Publication date: November 3, 2011
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: MING-XIANG HU, JUN-MIN CHEN, CHAO-DONG PENG, LE LIN, ZHI-JIAN LONG, XIAO-FEI CHEN
  • Patent number: 7989804
    Abstract: A test pattern structure including a first conductive layer and a second conductive layer is provided. The second conductive layer is directly disposed on the first conductive layer and connected to the first conductive layer through a plurality of connection interfaces. The test pattern structure of the present invention can detect the interconnection failure quickly and correctly without SEM identification.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: August 2, 2011
    Assignee: United Microelectronics Corp.
    Inventors: Da-Jiang Yang, Chih-Ping Lee, Rui-Huang Cheng, Xing-Hua Zhang, Xu Ma, Xiao-Fei Han, Hong Ma, Hong Liao, Yuan-Li Ding
  • Publication number: 20110163799
    Abstract: A bandgap reference circuit has trimming-up resistors and trimming-down resistors for bi-directional trimming. PNP transistors have base and collectors grounded and emitters connected to parallel resistors. A difference resistor drives an inverting input of an op amp that drives a transistor that generates the bandgap reference voltage Vbg. A sensing resistor connects Vbg to a splitting node that connects to the non-inverting input through a first parallel resistor. The splitting node also connects through a second parallel resistor to the inverting input. Fuses or switches enable the trimming-up and trimming-down resistors. The trimming-up resistors are in series with the sensing resistor and the trimming-down resistors are in series with an output resistor that connects Vbg to reference voltage Vref. The circuit can be designed for a more typical process since bi-directional trimming allows Vref to be raised or lowered. Many circuits need no trimming when targeted for the typical process.
    Type: Application
    Filed: January 4, 2010
    Publication date: July 7, 2011
    Applicant: Hong Kong Applied Science & Technology Research Institute Company Limited
    Inventors: Xiao Fei KUANG, Kam Chuen WAN, Kwai Chi CHAN, Yat To (William) WONG, Kwok Kuen (David) KWONG
  • Patent number: 7859607
    Abstract: A method for assembling a liquid crystal display includes steps of disposing a liquid crystal panel and a backlight module and blowing an ionic flow into the space between the liquid crystal panel and the backlight module to clean the surfaces of them. In addition, the method can be proceeded by an apparatus for assembling the liquid crystal display. The apparatus comprises a fastening device, a hoist platform, and an ionic particle-removal device. The fastening device has several vacuum suckers used to attach the surface of a liquid crystal panel and the panel is held and fixed. The hoist platform is disposed vertically under the fastening device to carry a backlight module and thus to adjust the distance between the liquid crystal panel and the backlight module.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: December 28, 2010
    Assignee: Au Optronics Corp.
    Inventors: Hua-Liang Zhang, Hung-I Kuo, Rui-Xiang Lai, Xiao-Fei Chen
  • Publication number: 20100302972
    Abstract: A method for testing a wireless connection of an electronic device includes the following steps. The electronic device is initialized to a stand-by state. A testing server connects the electronic device to form a wireless connection based on a wireless protocol. The testing server outputs a plurality of first data packages to the electronic device and receives a plurality of second data packages from the electronic device to test a rate of data throughput via the wireless connection by the testing server. A wake-up signal is sent to the electronic device via the wireless connection to the electronic device.
    Type: Application
    Filed: September 1, 2009
    Publication date: December 2, 2010
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO. LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: WEN-YI WU, XIAO-FEI LIU, WEN DENG
  • Publication number: 20100275427
    Abstract: A method for assembling a liquid crystal display includes steps of disposing a liquid crystal panel and a backlight module and blowing an ionic flow into the space between the liquid crystal panel and the backlight module to clean the surfaces of them. In addition, the method can be proceeded by an apparatus for assembling the liquid crystal display. The apparatus comprises a fastening device, a hoist platform, and an ionic particle-removal device. The fastening device has several vacuum suckers used to attach the surface of a liquid crystal panel and the panel is held and fixed. The hoist platform is disposed vertically under the fastening device to carry a backlight module and thus to adjust the distance between the liquid crystal panel and the backlight module.
    Type: Application
    Filed: July 14, 2010
    Publication date: November 4, 2010
    Inventors: Hua-Liang Zhang, Hung-I Kuo, Rui-Xiang Lai, Xiao-Fei Chen
  • Publication number: 20100227131
    Abstract: A test pattern structure including a first conductive layer and a second conductive layer is provided. The second conductive layer is directly disposed on the first conductive layer and connected to the first conductive layer through a plurality of connection interfaces. The test pattern structure of the present invention can detect the interconnection failure quickly and correctly without SEM identification.
    Type: Application
    Filed: March 4, 2009
    Publication date: September 9, 2010
    Applicant: United Microelectronics Corp.
    Inventors: Da-Jiang Yang, Chih-Ping Lee, Rui-Huang Cheng, Xing-Hua Zhang, Xu Ma, Xiao-Fei Han, Hong Ma, Hong Liao, Yuan-Li Ding
  • Patent number: 7761535
    Abstract: A method and system for synchronizing a main database of a server and a local database of a handheld device. A user can use an application residing in the handheld device to make transactions in the local database. During a synchronization operation, the handheld device and server are coupled. The system then determines whether the application should be updated and, if so, causes the server to provide an update. The system also causes the handheld device to provide to the server information related to the transactions made by the user to the local database. The system causes the server to perform transactions on the main database based on the transaction information. The system also causes the server to extract data from the main database. The server can then provide at least some of the extracted data to the handheld device to update the local database.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: July 20, 2010
    Assignee: Siebel Systems, Inc.
    Inventors: Xiao Fei Huang, Magnus Vejlstrup, David L. Rabbers, Pi-Yu Chung, Martin Susser, Aaron B. Hansen, Brian Scott, David J. George
  • Patent number: 7710094
    Abstract: A power converter has a power transistor driving a power current through an inductor to provide a controlled power-supply voltage. The power transistor is on during a first state but off during a second state when a sink transistor reduces the power current through the inductor. Both voltage sensing of the power-supply voltage and current sensing at the power transistor provide feedback to control the amount of time that the first state is active, and thus control the power current. Current sensing is provided by a smaller minor transistor in parallel with the power transistor. The minor transistor turns on after the power transistor to reduce disturbance spikes. Switches connect sources of the power and mirror transistors to an amplifier that drives a sensing transistor. The sensing transistor generates a sensing voltage from the mirror transistor source. During the second state the amplifier's inputs are equalized to provide fast response.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: May 4, 2010
    Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Yat To William Wong, Xiao Fei Kuang, Kam Chuen Wan, Kwok Kuen David Kwong
  • Patent number: 7479111
    Abstract: Disclosed is a method for measuring an arterial blood pressure of a subject comprising detecting a pulse-wave-related signal of the subject; extracting a feature from the signals; determining a factor that can affect the arterial blood pressure of the subject; and determining the arterial blood pressure based on the feature with an automatic compensation for the factors. The disclosed method reduces the error in measuring the blood pressure based on characteristics of the pulse-wave-related signals.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: January 20, 2009
    Assignee: The Chinese University of Hong Kong
    Inventors: Yuan Ting Zhang, Lung Yip, Xiao Fei Teng, Chung Yan Carmen Poon, Chi Man Lee
  • Publication number: 20060256252
    Abstract: A method for assembling a liquid crystal display includes steps of disposing a liquid crystal panel and a backlight module and blowing an ionic flow into the space between the liquid crystal panel and the backlight module to clean the surfaces of them. In addition, the method can be proceeded by an apparatus for assembling the liquid crystal display. The apparatus comprises a fastening device, a hoist platform, and an ionic particle-removal device. The fastening device has several vacuum suckers used to attach the surface of a liquid crystal panel and the panel is held and fixed. The hoist platform is disposed vertically under the fastening device to carry a backlight module and thus to adjust the distance between the liquid crystal panel and the backlight module.
    Type: Application
    Filed: May 9, 2006
    Publication date: November 16, 2006
    Inventors: Hua-Liang Zhang, Hung-I Kuo, Rui-Xiang Lai, Xiao-Fei Chen
  • Publication number: 20040210948
    Abstract: A method of video splitting and distributed placement scheme for clustered video servers including defining a network packet format for the streaming media and the distributed control file formats for the clips; obtaining the information of streaming media files, getting the basic information of streaming media files and accepting the preliminary splitting requirements of users; defining the placement strategy of clips, obtaining the placement requirements configured by users; analyzing the streaming media files and generating the lists of splitting tasks; running the splitting tasks. According to the number of the clips requested by users, the job is to created multi-threads and each thread processes a splitting task; clips transmission and storage. According to the placement strategy of clips, the job is to transfer the clips to the corresponding storage nodes.
    Type: Application
    Filed: January 26, 2004
    Publication date: October 21, 2004
    Applicants: HUAZHON UNIVERSITY OF SCIENCE TECHNOLOGY, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hai Jin, Xiao Fei Liao, Qiong Hua Hu, Li Ping Pang
  • Publication number: 20030159136
    Abstract: A method and system for synchronizing a main database of a server and a local database of a handheld device. A user can use an application residing in the handheld device to make transactions in the local database. During a synchronization operation, the handheld device and server are coupled. The system then determines whether the application should be updated and, if so, causes the server to provide an update. The system also causes the handheld device to provide to the server information related to the transactions made by the user to the local database. The system causes the server to perform transactions on the main database based on the transaction information. The system also causes the server to extract data from the main database. The server can then provide at least some of the extracted data to the handheld device to update the local database.
    Type: Application
    Filed: February 25, 2002
    Publication date: August 21, 2003
    Inventors: Xiao Fei Huang, Magnus Vejlstrup, David L. Rabbers, Pi-Yu Chung, Martin Susser, Aaron B. Hanson, Brian Scott, David J. George
  • Patent number: D517671
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: March 21, 2006
    Assignee: Shanghai Neo Tec Electron Co., Ltd.
    Inventor: Xiao Fei Chen
  • Patent number: D522115
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: May 30, 2006
    Assignee: Shanghai Neo Tec Electron Co., Ltd.
    Inventor: Xiao Fei Chen