Patents by Inventor Dong H. Nguyen

Dong H. Nguyen 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).

  • Electronic Devices With Ambient Flicker Detection
    Publication number: 20250067595
    Abstract: An electronic device may have a sensor to measure ambient flicker. The sensor may be a sigma-delta converter. The flicker may be calculated based on the voltage output of the sigma-delta converter and the number of times the sigma-delta converter is triggered during a predetermined period, thereby reducing the voltage output. In particular, a fast Fourier transform (FFT) may be used on these values to determine the flicker. If desired, filtering and/or non-uniform sampling may be incorporated to avoid aliasing. Additionally or alternatively, a Lomb-Scargle spectral analysis may be used to prevent the attenuation of the measured flicker signals. As an alternative to using a sigma-delta converter to determine ambient flicker, a folding capacitive transimpedance amplifier (C-TIA) circuit or a circuit with an analog to digital converter and digital filter may be used to measure the ambient flicker.
    Type: Application
    Filed: March 22, 2024
    Publication date: February 27, 2025
    Inventors: Anand K. Chamakura, Stephen N. Sweet, Ali Motamed, Dong Zheng, Jianjun Guo, Chau H. Nguyen
  • Method and apparatus to control TX/RX AMSDU size based on the negotiated maximum transmission unit in the tunnel between a controller and an access point
    Patent number: 9154432
    Abstract: A method includes selecting upstream and downstream aggregated MAC service data unit (AMSDU) sizes for communications between a client device, an access point, and an controller in a network system. The upstream and downstream AMSDU sizes may be separately selected based on the maximum transmission unit (MTU) size for communications in a secure tunnel between the controller and the access point to avoid fragmentation and reassembly of AMSDUs transmitted in a single MTU. The upstream and downstream AMSDU sizes may be selected to be less or equal to the MTU size.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: October 6, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Aidan P. Doyle, Bhanu S. Gopalasetty, Dong H. Nguyen, Sathish Damodaran
  • METHOD AND APPARATUS TO CONTROL TX/RX AMSDU SIZE BASED ON THE NEGOTIATED MAXIMUM TRANSMISSION UNIT IN THE TUNNEL BETWEEN A CONTROLLER AND AN ACCESS POINT
    Publication number: 20140369210
    Abstract: A method includes selecting upstream and downstream aggregated MAC service data unit (AMSDU) sizes for communications between a client device, an access point, and an controller in a network system. The upstream and downstream AMSDU sizes may be separately selected based on the maximum transmission unit (MTU) size for communications in a secure tunnel between the controller and the access point to avoid fragmentation and reassembly of AMSDUs transmitted in a single MTU. The upstream and downstream AMSDU sizes may be selected to be less or equal to the MTU size.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Aidan P. Doyle, Bhanu S. Gopalasetty, Dong H. Nguyen, Sathish Damodaran