Patents by Inventor Frederick Alan Williams

Frederick Alan Williams 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).

  • Transformerless switching regulator with controllable boost factor
    Patent number: 10193541
    Abstract: For transformerless switching regulators, a current-mode controlled boost converter operates based on current sensing through a switch to ground, allowing use of common controllers. To avoid reverse current from a cascaded charge pump, the input of the charge pump is blocked by a diode from passing through the switch to ground and is itself separately switched to ground.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: January 29, 2019
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Frederick Alan Williams, Robert A. Hewitt, David A. Petersen