Patents by Inventor Samuel P. Rankin

Samuel P. Rankin 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).

  • Current-to-voltage-converter for a biosensor
    Patent number: 6908535
    Abstract: An integrated current-to-voltage conversion circuit converts a first current to an output voltage representative of the first current. The circuit includes a first contact pad and second and third contact pads capable of being coupled across a first resistor. A first operational amplifier has a first input coupled to the first contact pad for producing a first voltage thereat, a second input for receiving a reference voltage, and a first output coupled to the third contact pad. A second voltage appears at the third contact pad. A second operational amplifier has a second output at which a third voltage appears, a first input coupled to the second output, and a second input coupled to the second contact pad. The output voltage is substantially equal to the difference between the second and third voltages.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: June 21, 2005
    Assignee: Medtronic, Inc.
    Inventors: Samuel P. Rankin, Scott D. Vernon
  • Current-to-voltage-converter
    Publication number: 20030168335
    Abstract: An integrated current-to-voltage conversion circuit converts a first current to an output voltage representative of the first current. The circuit includes a first contact pad and second and third contact pads capable of being coupled across a first resistor. A first operational amplifier has a first input coupled to the first contact pad for producing a first voltage thereat, a second input for receiving a reference voltage, and a first output coupled to the third contact pad. A second voltage appears at the third contact pad. A second operational amplifier has a second output at which a third voltage appears, a first input coupled to the second output, and a second input coupled to the second contact pad. The output voltage is substantially equal to the difference between the second and third voltages.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 11, 2003
    Inventors: Samuel P. Rankin, Scott D. Vernon