Patents by Inventor Guido P. Torelli

Guido P. Torelli 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).

  • Digital to analog converter with dual resistor string
    Patent number: 5703588
    Abstract: In a dual resistor string digital-to-analog converter, current biasing is used to isolate a first resistor string from a second resistor string. The first resistor string consist of multiple first resistors, and a first switch network responsive to the MSBs selectively couples the second resistor string in parallel to any one first resistor within the first resistor string. To prevent the second resistor string from drawing current from the first resistor string, a current source feeds a bias current into the second resistor string and a current drain draws the bias current from the second resistor string. The bias current is adjusted such that the voltage drop across the whole of the second resistor string is equal to the voltage drop across any one first resistor within the first resistor string.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 30, 1997
    Assignee: Atmel Corporation
    Inventors: Roberto Rivoir, Franco Maloberti, Guido P. Torelli