Patents by Inventor Max A. Child

Max A. Child 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).

  • Methods and apparatus for managing the charging and discharging of a lithium battery
    Patent number: 5949218
    Abstract: An apparatus and corresponding method are provided for regulating the voltage potential of a lithium ion battery based upon an operating range having an upper threshold (e.g., on the order of 4.2 v) and a lower threshold (e.g., on the order of 2.5 v) and for providing a reduction in dissipated power when the lithium ion battery is charging and when a load is drawing upon the lithium ion battery. The apparatus includes a p-minus substrate and a first p-channel enhancement Field Effect Transistor (FET) integrally formed on the p-minus substrate. The first p-channel enhancement FET is configured to limit charging of the lithium ion battery when the voltage potential of the lithium ion battery is greater than the upper threshold.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: September 7, 1999
    Assignee: Conexant Systems, Inc.
    Inventors: Joseph H. Colles, Jean-Christophe Berchtold, Max A. Child