Apparatus and methods for virtually linear and temperature-independent sensing of magnetic fields
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsPaymon Shirazi, Subrata Sanyal
Life of this patent
Estimating the term…
Abstract
Disclosed are apparatus and methods for sensing and measurement of magnetic fields that are insensitive to temperature, and respond linearly to the magnitude of the magnetic field. In particular, the apparatus and methods include the use of a resistance network including at least one fluorinated graphene foam (FGF) magnetoresistive device. Measurement of a voltage drop across at least one FGF magnetoresistive device is correlated to either merely the presence of a magnetic field or for measurement of at least a scalar magnitude value of the magnetic field. The use of FGF affords both temperature-insensitivity and linear magnetic field responsivity.
Claims16
A magnetic field sensor comprising:
- a resistance network including at least one fluorinated graphene foam (FGF) magnetoresistive device;
- an input configured to couple a voltage source to the resistance network;
- and
- an output coupled to the resistance network and configured to allow measurement of a voltage drop across at least the at least one FGF magnetoresistive device that can be correlated to at least one of a presence of a magnetic field or a scalar magnitude value of the magnetic field.
A magnetic field sensor comprising:
- a resistance network including:
- a first resistance and a second resistance coupled in series at a first node;
- a third resistance and a fluorinated graphene foam (FGF) coupled in series at a second node;
- wherein the first and second resistances in series are coupled in parallel with the third resistance and the FGF in series at third and fourth nodes;
- an input configured to couple a voltage source across the third and fourth nodes;
- and
- an output coupling configured to couple the first and second nodes to an output.
Dependencies are inferred from the claim text.