Patents by Inventor Ding C. Woo

Ding C. Woo 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: 10158224
    Abstract: An exemplary apparatus provides a regulated DC voltage output from an input from supply DC voltage source. A regulation circuit having an input terminal coupled to the supply DC voltage source, an output terminal on which is provided the regulated DC voltage output, and a current control terminal capable of controlling a maximum current that can flow through the regulation circuit where a level of maximum current is controlled proportionate to an amount of resistance connected to the current control terminal. A surge control circuit connected to the current control terminal automatically supplies a variable resistance beginning with one resistance at turn-ON and varying to another resistance at a predetermined time interval after turn-ON to limit the current that can flow at turn-ON until a steady state of the regulation circuit is reached.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: December 18, 2018
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Ding C. Woo