Patents by Inventor James Harold Lauffenberger

James Harold Lauffenberger 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).

  • Low power integrating circuit for use with a photodetector and optical sensor including such an integrating circuit
    Patent number: 6849845
    Abstract: There is described an integrating circuit (20) for use with a photodetector (10) and an optical sensor (1) including such an integrating circuit. The integrating circuit comprises an operational amplifier (30) having a non-inverting input (32) connected to a non-zero bias voltage (VPD-BIAS), an inverting input (31) coupled to the photodetector (10), and at least one output (33). This integrating circuit further includes an integrating voltage storage device (25) having a first terminal coupled to the operational amplifier output and a second terminal coupled to the operational amplifier inverting input, and switching circuitry for controlling timing of the integrating circuit and switching the integrating circuit between a reset phase and an integration phase.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: February 1, 2005
    Assignee: EM Microelectronic-Marin SA
    Inventors: James Harold Lauffenberger, Kevin Scott Buescher