Patents by Inventor James P. Berthold

James P. Berthold 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).

  • Patent number: 6058783
    Abstract: A capacitive transducer (10) which provides an output voltage in response to the application of a mechanical stimulus such as pressure or acceleration includes a signal conditioning integrated circuit (12) to which are connected a variable capacitor (C.sub.VAR), a reference capacitor (C.sub.REF), a linear correction capacitor (C.sub.LIN) as well as an integrating capacitor (C.sub.INT) and associated filtering components. The linear correction capacitor (C.sub.LIN) is used to offset a fixed parasitic charge associated with the variable capacitor. Any net error charge appearing on a detect, common node (pin 4) between the variable capacitor and the reference capacitor is cancelled out by means of an analog feedback network (22). In a modified embodiment a thermal compensation network (40) allows for correction for thermal error at a second temperature without having any affect at a first temperature.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: May 9, 2000
    Assignee: Texas Instruments Incorporated
    Inventors: James P. Berthold, Keith W. Kawate
  • Patent number: 5770802
    Abstract: A capacitive transducer (10) which provides an output voltage in response to the application of a mechanical stimulus such as pressure or acceleration includes a signal conditioning integrated circuit (12) to which are connected a variable capacitor (C.sub.VAR), a reference capacitor (C.sub.REF), a linear correction capacitor (C.sub.LIN) as well as an integrating capacitor (C.sub.INT) and associated filtering components. The linear correction capacitor (C.sub.LIN) is used to offset a fixed parasitic charge associated with the variable capacitor. Any net error charge appearing on a detect, common node (pin 4) between the variable capacitor and the reference capacitor is cancelled out by means of an analog feedback network (22). In a modified embodiment a thermal compensation network (40) allows for correction for thermal error at a second temperature without having any affect at a first temperature.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: June 23, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: James P. Berthold, Keith W. Kawate
  • Patent number: 5068606
    Abstract: A measuring circuit comprising a transducer, a comparator controlled by the transducer, a bandgap reference circuit with current compensation, a first current mirror, a second current mirror controlled by the comparator and bandgap reference to control the total current. The transducer is a magnetoresistive transducer.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: November 26, 1991
    Inventors: Keith W. Kawate, James P. Berthold, Robert M. Margolis