Patents Represented by Attorney Schwegman, Lundberg & Woessner LLP

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  • Apparatus and methods for proximity sensing circuitry
    Patent number: 7808235
    Abstract: An inductive proximity sensor is disclosed. The proximity sensor includes a resonator with a bifurcated inductance coupled to a plurality of transimpedance amplifiers. A portion of the resonator is configured to generate eddy currents in a target containing metal. In various embodiments, the transimpedance amplifiers provide signals associated with eddy currents to a synchronous detector. Apparatus and methods for operating the inductive proximity sensor are disclosed.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: October 5, 2010
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: George E. Rollins, Prachi S. Kulkarni