Patents by Inventor Charles Chang-I Wang

Charles Chang-I Wang 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: 10771234
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive an otw signal that is associated with low-path pass information and transmission data. The apparatus may apply a cost function and an update function to the otw signal prior to sending the otw signal to an oscillator. The apparatus may determine a correction factor for use in estimating a gain of the oscillator based at least in part on an output of the update function.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: September 8, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Emanuele Lopelli, Magnus Olov Wiklund, Charles Chang-I Wang, Salvatore Pennisi, Richard McConnell
  • Publication number: 20200106599
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive an otw signal that is associated with low-path pass information and transmission data. The apparatus may apply a cost function and an update function to the otw signal prior to sending the otw signal to an oscillator. The apparatus may determine a correction factor for use in estimating a gain of the oscillator based at least in part on an output of the update function.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Inventors: Emanuele LOPELLI, Magnus Olov WIKLUND, Charles Chang-I WANG, Salvatore PENNISI, Richard MCCONNELL
  • Publication number: 20170180149
    Abstract: The various embodiments include methods and systems for facilitating the configuration of smart objects within a wireless communication system by leveraging the microphonic effect to enable a user to identify each smart object to a control device. By configuring the control device to monitor wireless signals from a plurality of smart objects for small modulations due to the microphonic effect from a user tap on a particular smart object, the control device may recognize a particular smart device to be configured. By coordinating the monitoring for small modulations in received signals with a user interface for registering smart objects, various embodiments provide a simple mechanism by which users can correlate smart objects to corresponding icons or object names in a control interface. The various embodiments enable a user to complete the onboarding a smart objects with a control device without requiring the need to enter information into a user interface.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 22, 2017
    Inventors: Richard Joseph McConnell, Daniel Chikami, Troy Li, Scott Scigliano, Charles Chang-I Wang, Thomas Williams
  • Patent number: 9459292
    Abstract: Aspects of the present disclosure are generally directed to techniques and apparatus for estimating a gain of a VCO in a PLL. In certain aspects, the technique includes calculating a C-V characteristic of a varactor matched to another varactor in the VCO. The technique also includes estimating the gain of the VCO based on the C-V characteristic of the varactor, a tank inductance of the VCO, and an output frequency of the VCO. Aspects of the present disclosure allow for estimating the gain of the VCO while the PLL remains in operation.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: October 4, 2016
    Assignee: QUALCOMM INCORPORATED
    Inventors: Emanuele Lopelli, Charles Chang-I Wang, Salvatore Pennisi, Shervin Moloudi
  • Publication number: 20150268279
    Abstract: Estimating a gain of a VCO in a PLL, including: means for matching to a varactor in the VCO; and means for estimating the gain of the VCO by calculating a C-V characteristic of the means for matching along with tank inductance and an output frequency of the VCO, wherein estimating the gain of the VCO by calculating the C-V characteristic of the means for matching allows the PLL to remain in operation during estimation.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 24, 2015
    Applicant: QUALCOMM INCORPORATED
    Inventors: Emanuele LOPELLI, Charles Chang-I WANG, Salvatore PENNISI, Shervin MOLOUDI
  • Patent number: 8184033
    Abstract: Techniques for an analog-to-digital converter (ADC) using pipeline architecture includes a linearization technique for a spurious-free dynamic range (SFDR) over 80 deciBels. In some embodiments, sampling rates exceed a megahertz. According to a second approach, a switched-capacitor circuit is configured for correct operation in a high radiation environment. In one embodiment, the combination yields high fidelity ADC (>88 deciBel SFDR) while sampling at 5 megahertz sampling rates and consuming <60 milliWatts. Furthermore, even though it is manufactured in a commercial 0.25-?m CMOS technology (1 ?m=12?6 meters), it maintains this performance in harsh radiation environments. Specifically, the stated performance is sustained through a highest tested 2 megarad(Si) total dose, and the ADC displays no latchup up to a highest tested linear energy transfer of 63 million electron Volts square centimeters per milligram at elevated temperature (131 degrees C.) and supply (2.7 Volts, versus 2.5 Volts nominal).
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: May 22, 2012
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Charles Chang-I Wang, Ivan Richard Linscott, Umran S. Inan
  • Publication number: 20110169678
    Abstract: Techniques for an analog-to-digital converter (ADC) using pipeline architecture includes a linearization technique for a spurious-free dynamic range (SFDR) over 80 deciBels. In some embodiments, sampling rates exceed a megahertz. According to a second approach, a switched-capacitor circuit is configured for correct operation in a high radiation environment. In one embodiment, the combination yields high fidelity ADC (>88 deciBel SFDR) while sampling at 5 megahertz sampling rates and consuming <60 milliWatts. Furthermore, even though it is manufactured in a commercial 0.25-?m CMOS technology (1 ?m=12?6 meters), it maintains this performance in harsh radiation environments. Specifically, the stated performance is sustained through a highest tested 2 megarad(Si) total dose, and the ADC displays no latchup up to a highest tested linear energy transfer of 63 million electron Volts square centimeters per milligram at elevated temperature (131 degrees C.) and supply (2.7 Volts, versus 2.5 Volts nominal).
    Type: Application
    Filed: May 12, 2010
    Publication date: July 14, 2011
    Applicant: Stanford University
    Inventors: Charles Chang-I Wang, Ivan Richard Linscott, Umran S. Inan