Patents by Inventor Joao P. Carreira

Joao P. Carreira 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).

  • Cyclic digital to analog converter
    Patent number: 8223056
    Abstract: Some embodiments include apparatus and methods having an amplifier, a capacitor network coupled to the amplifier, and switching circuitry coupled to the amplifier and the capacitor network. The switching circuit is configured to successively apply a selected reference voltage selected from among a first reference voltage, a second reference voltage, and a third reference voltage to the capacitor network in response to a digital input code to generate an output voltage. Additional embodiments are disclosed.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: July 17, 2012
    Assignee: Atmel Corporation
    Inventors: Renaud Dura, Joao P. Carreira, Sebastien Fievet