Patents by Inventor Fatima D. Da Costa Seidel

Fatima D. Da Costa Seidel 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).

  • DC level shifting circuit for analog circuits
    Patent number: 5459427
    Abstract: A DC translation circuit (200) provides maximum dynamic range in DC level shifting that is temperature and process invariant. The DC translation circuit (200) includes a bandgap reference (202) and current mirror circuit (204) for providing a reference current, Iref. An op-amp circuit (210) receives an AC signal centered about a first DC level, and translates the first DC level into a second DC level using the reference current, a current mirror circuit (208), op-amp circuit (210) and resistor (R2).
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: October 17, 1995
    Assignee: Motorola, Inc.
    Inventors: Mark J. Chambers, Fatima D. Da Costa Seidel, Jesus P. Finol, James B. Phillips