Patents by Inventor Henry Ngo

Henry Ngo 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).

  • NON-LINEAR CHARGE PUMP FOR PHASED LOCK LOOPS
    Publication number: 20240088903
    Abstract: A non-linear charge pump for phased lock loops. Furthermore, an auxiliary charge pump apparatus, comprising a positive switch electrically connected to a current source configured to supplement power to a charge pump, a negative switch electrically connected to a current sink configured to discharge power from the charge pump, a windowing comparator, further comprising an input signal received from a phase-locked loop, a first comparator configured to compare the input signal against a high voltage threshold, a second comparator configured to compare the input signal against a low voltage threshold, an AND logic gate configured to provide a window signal and an activation circuit electrically connected to the positive switch and negative switch. Additionally, a non-linear charge pump system and method for reacquiring frequency lock of a phase lock loop.
    Type: Application
    Filed: September 13, 2022
    Publication date: March 14, 2024
    Inventors: Jia-Chi Samuel Chieh, Henry Ngo
  • Non-linear charge pump for phased lock loops
    Patent number: 11929753
    Abstract: A non-linear charge pump for phased lock loops. Furthermore, an auxiliary charge pump apparatus, comprising a positive switch electrically connected to a current source configured to supplement power to a charge pump, a negative switch electrically connected to a current sink configured to discharge power from the charge pump, a windowing comparator, further comprising an input signal received from a phase-locked loop, a first comparator configured to compare the input signal against a high voltage threshold, a second comparator configured to compare the input signal against a low voltage threshold, an AND logic gate configured to provide a window signal and an activation circuit electrically connected to the positive switch and negative switch. Additionally, a non-linear charge pump system and method for reacquiring frequency lock of a phase lock loop.
    Type: Grant
    Filed: September 13, 2022
    Date of Patent: March 12, 2024
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Jia-Chi Samuel Chieh, Henry Ngo