Patents by Inventor Yuxing Zhang

Yuxing Zhang 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).

  • Publication number: 20190226088
    Abstract: Embodiments herein generally relate to gas distribution apparatuses. In one aspect, the disclosure relates to a faceplate having a plurality of apertures therethrough. Thermal chokes are disposed on the faceplate radially outward of the apertures. Seals are disposed at distal ends of the thermal chokes and are thermally separated from a body of the faceplate by the thermal chokes.
    Type: Application
    Filed: January 23, 2019
    Publication date: July 25, 2019
    Inventors: Yuxing ZHANG, Sanjeev BALUJA, Kaushik ALAYAVALLI, Kalyanjit GHOSH, Daniel HWUNG
  • Publication number: 20190226089
    Abstract: Embodiments herein relate to an apparatus for use in a substrate processing chamber is disclosed herein. The apparatus has a faceplate, a support member, and a spacer. A plurality of apertures is formed through the faceplate. The faceplate is coupled to and supported by the support member. The spacer is further coupled to the support member.
    Type: Application
    Filed: January 23, 2019
    Publication date: July 25, 2019
    Inventors: Yuxing ZHANG, Sanjeev BALUJA, Kaushik ALAYAVALLI, Kalyanjit GHOSH, Daniel HWUNG
  • Publication number: 20190119816
    Abstract: Embodiments herein relate to gas distribution apparatuses. In one aspect, the disclosure herein relates to a showerhead including a body having an upper surface and a lower surface. A thermal choke is disposed adjacent a perimeter of the body. The thermal choke includes a plurality of interleaved channels. One or more apertures are disposed between the upper surface and the lower surface of the body.
    Type: Application
    Filed: October 23, 2018
    Publication date: April 25, 2019
    Inventors: Yuxing ZHANG, Daniel HWUNG, Ashutosh AGARWAL, Kaushik ALAYAVALLI, Kalyanjit GHOSH
  • Publication number: 20190122872
    Abstract: Systems and methods for depositing a film in a PECVD chamber while reducing residue buildup in the chamber. In some embodiments disclosed herein, a processing chamber includes a chamber body, a substrate support, a showerhead, and one or more heaters configured to heat the showerhead. In some embodiments, the processing chamber includes a controller.
    Type: Application
    Filed: December 21, 2018
    Publication date: April 25, 2019
    Inventors: Kalyanjit GHOSH, Sanjeev BALUJA, Mayur G. KULKARNI, Shailendra SRIVASTAVA, Tejas ULAVI, Yusheng ALVIN ZHOU, Amit Kumar BANSAL, Priyanka DASH, Zhijun JIANG, Ganesh BALASUBRAMANIAN, Qiang MA, Kaushik ALAYAVALLI, Yuxing ZHANG, Daniel HWUNG, Shawyon JAFARI
  • Publication number: 20180218369
    Abstract: A processing system processes transactions between users and merchant systems. The processing system extracts, for a group of transactions, features from each user transaction and generates, for each feature, a feature vector representing each transaction of the group of transactions. The processing system computes, for each feature vector shared between transactions, a similarity between each transaction and all other transactions of the group of transactions. The processing system clusters the transactions represented by the feature vectors via a hierarchical clustering algorithm based on the similarity values. The processing system, for each cluster of transactions, determines a volume of the cluster over time. For each cluster, the payment processing system determines whether the change in the volume of the cluster over time is anomalous or normal. If a cluster experienced anomalous growth, the payment processing system identifies the cluster as a potential new fraudulent transaction pattern.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 2, 2018
    Inventors: Bingjun Xiao, Yuxing Zhang, Haichun Chen
  • Publication number: 20170353994
    Abstract: A pedestal is provided that includes a body, a heater embedded in the body, a support pocket formed within the body having a surface disposed in a first plane, a peripheral surface disposed in a second plane surrounding the support pocket, and a plurality of centering tabs positioned between the support pocket and the peripheral surface, each of the centering tabs having a surface disposed in a third plane that is between both of the first and second planes.
    Type: Application
    Filed: June 6, 2016
    Publication date: December 7, 2017
    Inventors: Sam H. KIM, Yuxing ZHANG, Milind GADRE, Sanjeev BALUJA
  • Patent number: 9019140
    Abstract: In one embodiment, a method for converting an analog input value to a digital output value is disclosed. A successive approximation is performed. The analog input is quantized to a first quantized value, which is converted to a first analog value using a DAC. The first analog value is subtracted from the analog input value to form a first residue. The first residue is quantized to form a second quantized value, and a second residue is formed by converting the second quantized value to a second analog value using the DAC and subtracting the second analog value from the first residue value. The second residue is then quantized to form a third quantized value. The first, second and third quantized values are converted into a digital output value. The first, second and third quantized values each have at least three levels.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: April 28, 2015
    Assignee: STMicroelectronics R&D (Shanghai) Co. Ltd.
    Inventors: Jian Hua Zhao, Yuxing Zhang
  • Patent number: 8798559
    Abstract: The present disclosure generally relates to predistortion that compensates for non-linearity of a power amplifier as well as short-term and long-term memory effects of the power amplifier. In one embodiment, a transmitter includes a power amplifier that amplifies a power amplifier input signal to provide a power amplifier output signal, a predistortion sub-system that effects predistortion of the power amplifier input signal to compensate for non-linearity of the power amplifier and memory effects of the power amplifier, and a adaptation sub-system that adaptively configures the predistortion sub-system. The predistortion sub-system includes a memory-less predistortion component that compensates for the non-linearity of the power amplifier, a Finite Impulse Response (FIR) filter that compensates for short-term memory effects of the power amplifier, and an Infinite Impulse Response (IIR) filter that compensates for long-term memory effects of the power amplifier.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: August 5, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Sai Mohan Kilambi, Yuxing Zhang, Chunlong Bai
  • Patent number: 8633769
    Abstract: One or more embodiments of a method and apparatus taught herein provide a predistortion system to compensate for the non-linearity of a power amplifier. The system includes an outer predistorter, an inner predistorter, and a first adaptation circuit. The predistorter predistorts an input signal to generate a first output signal, and uses a first memory model that models power amplifier memory effects within a first range of time constants. The inner predistorter predistorts the first output signal to generate a second output signal, and uses a second memory model that models power amplifier memory effects within a second range of time constants that is greater than the first range of time constants. The second output signal is provided as an input to the power amplifier, and the first adaptation circuit adapts the outer predistorter responsive to feedback from the power amplifier.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: January 21, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Chunlong Bai, Yuxing Zhang, Sai Mohan Kilambi
  • Publication number: 20140015699
    Abstract: In one embodiment, a method for converting an analog input value to a digital output value is disclosed. A successive approximation is performed. The analog input is quantized to a first quantized value, which is converted to a first analog value using a DAC. The first analog value is subtracted from the analog input value to form a first residue. The first residue is quantized to form a second quantized value, and a second residue is formed by converting the second quantized value to a second analog value using the DAC and subtracting the second analog value from the first residue value. The second residue is then quantized to form a third quantized value. The first, second and third quantized values are converted into a digital output value. The first, second and third quantized values each have at least three levels.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 16, 2014
    Applicant: STMicroelectronics R&D (Shanghai) Co. Ltd.
    Inventors: Jian Hua Zhao, Yuxing Zhang
  • Publication number: 20130241646
    Abstract: One or more embodiments of a method and apparatus taught herein provide a predistortion system to compensate for the non-linearity of a power amplifier. The system includes an outer predistorter, an inner predistorter, and a first adaptation circuit. The predistorter predistorts an input signal to generate a first output signal, and uses a first memory model that models power amplifier memory effects within a first range of time constants. The inner predistorter predistorts the first output signal to generate a second output signal, and uses a second memory model that models power amplifier memory effects within a second range of time constants that is greater than the first range of time constants. The second output signal is provided as an input to the power amplifier, and the first adaptation circuit adapts the outer predistorter responsive to feedback from the power amplifier.
    Type: Application
    Filed: August 24, 2012
    Publication date: September 19, 2013
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Chunlong Bai, Yuxing Zhang, Sai Mohan Kilambi
  • Patent number: 8537046
    Abstract: In one embodiment, a method for converting an analog input value to a digital output value is disclosed. A successive approximation is performed. The analog input is quantized to a first quantized value, which is converted to a first analog value using a DAC. The first analog value is subtracted from the analog input value to form a first residue. The first residue is quantized to form a second quantized value, and a second residue is formed by converting the second quantized value to a second analog value using the DAC and subtracting the second analog value from the first residue value. The second residue is then quantized to form a third quantized value. The first, second and third quantized values are converted into a digital output value. The first, second and third quantized values each have at least three levels.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 17, 2013
    Assignee: STMicroelectronics R & D (Shanghai) Co., Ltd.
    Inventors: Jian Hua Zhao, Yuxing Zhang
  • Publication number: 20130222059
    Abstract: The present disclosure generally relates to predistortion that compensates for non-linearity of a power amplifier as well as short-term and long-term memory effects of the power amplifier. In one embodiment, a transmitter includes a power amplifier that amplifies a power amplifier input signal to provide a power amplifier output signal, a predistortion sub-system that effects predistortion of the power amplifier input signal to compensate for non-linearity of the power amplifier and memory effects of the power amplifier, and a adaptation sub-system that adaptively configures the predistortion sub-system. The predistortion sub-system includes a memory-less predistortion component that compensates for the non-linearity of the power amplifier, a Finite Impulse Response (FIR) filter that compensates for short-term memory effects of the power amplifier, and an Infinite Impulse Response (IIR) filter that compensates for long-term memory effects of the power amplifier.
    Type: Application
    Filed: February 28, 2012
    Publication date: August 29, 2013
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Sai Mohan Kilambi, Yuxing Zhang, Chunlong Bai
  • Publication number: 20120326901
    Abstract: In one embodiment, a method for converting an analog input value to a digital output value is disclosed. A successive approximation is performed. The analog input is quantized to a first quantized value, which is converted to a first analog value using a DAC. The first analog value is subtracted from the analog input value to form a first residue. The first residue is quantized to form a second quantized value, and a second residue is formed by converting the second quantized value to a second analog value using the DAC and subtracting the second analog value from the first residue value. The second residue is then quantized to form a third quantized value. The first, second and third quantized values are converted into a digital output value. The first, second and third quantized values each have at least three levels.
    Type: Application
    Filed: December 20, 2011
    Publication date: December 27, 2012
    Applicant: STMicroelectronics R&D (Shanghai) Co. Ltd.
    Inventors: Jian Hua Zhao, Yuxing Zhang
  • Patent number: 8237596
    Abstract: For high resolution resistor string DACs, a resistor string is placed in an array of columns and rows, each resistor tap is connected to a switch network, and a decoder is used to select switches to be closed such that sub-DAC voltage comes from the resistor taps connected to the selected switches. The voltages from each row of the resistor string are fed into a multiplexer, wherein the multiplexer produces an output voltage. A method and apparatus are disclosed for implementing the reflective nature of Gray code to design a DAC such that all the switches in a column of the resistor string may be controlled with only one control signal, thereby reducing extra routing costs, surface area, and dynamic power consumed by the circuit.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: August 7, 2012
    Assignee: STMicroelectronics R&D (Shanghai) Co., Ltd.
    Inventors: Jianhua Zhao, Yuan Yuan, Yuxing Zhang
  • Publication number: 20110156935
    Abstract: For high resolution resistor string DACs, a resistor string is placed in an array of columns and rows, each resistor tap is connected to a switch network, and a decoder is used to select switches to be closed such that sub-DAC voltage comes from the resistor taps connected to the selected switches. The voltages from each row of the resistor string are fed into a multiplexer, wherein the multiplexer produces an output voltage. A method and apparatus are disclosed for implementing the reflective nature of Gray code to design a DAC such that all the switches in a column of the resistor string may be controlled with only one control signal, thereby reducing extra routing costs, surface area, and dynamic power consumed by the circuit.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 30, 2011
    Inventors: Jian Hua Zhao, Yuan Yuan, Yuxing Zhang
  • Patent number: 7460047
    Abstract: A calibrator circuit and method for VCOM voltage adjustment for an LCD includes using integrated programmable resistive arrays. The method uses two DACs and three integrated circuit arrays to provide all of the advantages of VCOM calibrator circuits using external resistive voltage-dividers. The integrated circuit resistor arrays reduce the number of external components and PCB space. The method used is suitable for higher resolution adjustment of the VCOM voltage and no calculation is required in the whole adjustment procedure, which saves labor cost, time and enables automation of the calibrator fabrication.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: December 2, 2008
    Assignee: STMicroelectronics R&D (Shanghai) Co. Ltd.
    Inventors: Yuxing Zhang, Xiaoru Gao
  • Publication number: 20080055138
    Abstract: A calibrator circuit and method for VCOM voltage adjustment for an LCD includes using integrated programmable resistive arrays. The method uses two DACs and three integrated circuit arrays to provide all of the advantages of VCOM calibrator circuits using external resistive voltage-dividers. The integrated circuit resistor arrays reduce the number of external components and PCB space. The method used is suitable for higher resolution adjustment of the VCOM voltage and no calculation is required in the whole adjustment procedure, which saves labor cost, time and enables automation of the calibrator fabrication.
    Type: Application
    Filed: August 1, 2007
    Publication date: March 6, 2008
    Applicant: STMICROELECTRONICS R&D (SHANGHAI) CO. LTD.
    Inventors: Yuxing Zhang, Xiaoru Gao
  • Patent number: 6924715
    Abstract: Acoustic resonators such as surface acoustic wave (SAW) devices and thin film bulk acoustic resonators (FBAR) can be configured to produce a band reject filter. Such a filter overcomes the insertion loss and power handling limitations of conventional band pass configurations and as such can be used in power amplifier and duplexer applications.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: August 2, 2005
    Assignee: Nortel Networks Limited
    Inventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun, Yuxing Zhang
  • Publication number: 20040130411
    Abstract: Acoustic resonators such as surface acoustic wave (SAW) devices and thin film bulk acoustic resonators (FBAR) can be configured to produce a band reject filter. Such a filter overcomes the insertion loss and power handling limitations of conventional band pass configurations and as such can be used in power amplifier and duplexer applications.
    Type: Application
    Filed: September 16, 2003
    Publication date: July 8, 2004
    Inventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun, Yuxing Zhang