Patents by Inventor James L. Blackstone

James L. Blackstone 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).

  • Self-calibrating sensor
    Patent number: 7289924
    Abstract: A method for self-calibrating a sensor can be implemented in a system having a calibration circuit. The calibration circuit has differential circuitry which compares an output signal of the sensor with a predetermined reference signal associated with a reference property. A bias controller increments or decrements the sensor operating bias according to the deviation between the predetermined reference signals and sensor output signal such that the sensor output corresponds to the predetermined reference voltage. The calibration circuit can be embedded in the sensor to provide a self-calibrating sensor. Logic circuitry can be used to form the calibration circuit.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: October 30, 2007
    Assignee: Honeywell International Inc.
    Inventors: Raghavendra Muniraju, Sudheer Pulikkara Veedu, James L. Blackstone