Patents by Inventor Franz Wohlstreicher

Franz Wohlstreicher 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).

  • Charge amplifier for sensors outputting electrical charge
    Patent number: 5371472
    Abstract: A charge amplifier for sensors outputting electrical charge, particularly for piezoceramic pressure sensors, includes a voltage integrator having an output, an integration capacitor and a resistor connected parallel to the integration capacitor. A current-to-voltage converter is connected upstream of the voltage integrator and has an input. A negative feedback branch has a series circuit of a farther voltage integrator and a voltage-to-current converter. The negative feedback branch is connected between the output of the voltage integrator and the input of the current-to-voltage converter.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: December 6, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventor: Franz Wohlstreicher