Patents by Inventor Philip N. Zercher

Philip N. Zercher 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).

  • Inductive sensor with demodulator
    Patent number: 9816840
    Abstract: A transconductor converts voltage on an inductive sensor to a proportional current using two “coupling” capacitors. Responsive to movement of an electrically conductive target from the null position a resonant current is formed between the two sensor coils. A single differential transistor pair switched by periodic drive signals commutes the net alternating current at the single input to direct current.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: November 14, 2017
    Assignee: Blue Line Engineering
    Inventors: Steven D. Roach, Gregory H. Ames, Philip N. Zercher
  • INDUCTIVE SENSOR WITH DEMODULATOR
    Publication number: 20170234704
    Abstract: A transconductor converts voltage on an inductive sensor to a proportional current using two “coupling” capacitors. Responsive to movement of an electrically conductive target from the null position a resonant current is formed between the two sensor coils. A single differential transistor pair switched by periodic drive signals commutes the net alternating current at the single input to direct current.
    Type: Application
    Filed: August 31, 2016
    Publication date: August 17, 2017
    Applicant: Blue Line Engineering Company
    Inventors: Steven D. Roach, Gregory H. Ames, Philip N. Zercher
  • Inductive sensor with demodulator
    Patent number: 9459369
    Abstract: A transconductor converts voltage on an inductive sensor to a proportional current using two “coupling” capacitors. Responsive to movement of an electrically conductive target from the null position a resonant current is formed between the two sensor coils. A single differential transistor pair switched by periodic drive signals commutes the net alternating current at the single input to direct current.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: October 4, 2016
    Assignee: Blue Line Engineering Company
    Inventors: Steven D. Roach, Gregory H. Ames, Philip N. Zercher
  • Inductive Sensor with Demodulator
    Publication number: 20140253107
    Abstract: A transconductor converts voltage on an inductive sensor to a proportional current using two “coupling” capacitors. Responsive to movement of an electrically conductive target from the null position a resonant current is formed between the two sensor coils. A single differential transistor pair switched by periodic drive signals commutes the net alternating current at the single input to direct current.
    Type: Application
    Filed: October 4, 2013
    Publication date: September 11, 2014
    Inventors: Steven D. Roach, Gregory H. Ames, Philip N. Zercher