Patents by Inventor David Huitse Shen

David Huitse Shen 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).

  • Radio frequency energy detection
    Patent number: 9746505
    Abstract: In an embodiment, an apparatus may include first input and a second input to receive a differential input signal and may include a diode including an anode coupled to the first input and including a cathode coupled to the second input. The apparatus may further include a feedback circuit having an input coupled to the cathode and an output coupled to the anode. The feedback circuit may be configured to apply a feedback signal to the diode to maintain a substantially constant direct current across the diode. The apparatus may also include a comparator coupled to the feedback circuit and configured to compare the feedback signal to a threshold to detect radio frequency energy in the input signal in response to changes in the feedback signal.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: August 29, 2017
    Assignee: Silicon Laboratories, Inc.
    Inventor: David Huitse Shen
  • Initializing a ring counter
    Patent number: 9680478
    Abstract: A technique includes driving a node of a stage of a ring counter to a predetermined signal state; and clocking the ring counter to cause the signal state to propagate to at least one additional stage of the ring counter to initialize the ring counter with a reset sequence.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: June 13, 2017
    Assignee: Silicon Laboratories Inc.
    Inventors: Tufan Karalar, David Huitse Shen
  • Radio Frequency Energy Detection
    Publication number: 20160154039
    Abstract: In an embodiment, an apparatus may include first input and a second input to receive a differential input signal and may include a diode including an anode coupled to the first input and including a cathode coupled to the second input. The apparatus may further include a feedback circuit having an input coupled to the cathode and an output coupled to the anode. The feedback circuit may be configured to apply a feedback signal to the diode to maintain a substantially constant direct current across the diode. The apparatus may also include a comparator coupled to the feedback circuit and configured to compare the feedback signal to a threshold to detect radio frequency energy in the input signal in response to changes in the feedback signal.
    Type: Application
    Filed: December 1, 2014
    Publication date: June 2, 2016
    Inventor: David Huitse Shen
  • Initializing A Ring Counter
    Publication number: 20130077734
    Abstract: A technique includes driving a node of a stage of a ring counter to a predetermined signal state; and clocking the ring counter to cause the signal state to propagate to at least one additional stage of the ring counter to initialize the ring counter with a reset sequence.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 28, 2013
    Inventors: Tufan Karalar, David Huitse Shen