.~.~ Semiconductor type solid-state or magnetoresistive magnetometers
DEFINITION
Classification: 324/252
Semiconductor type solid-state or magneto-resistive magnetometers:
(under subclass 244) Subject matter wherein the apparatus to sense and indicate the sensing of a magnetic field includes (1) a resistance of magnetic material having a current flow there-through and an indicator connected to the resistance whereby the magnetic field tested passing through the material changes the current noted on the indicator, or (2) a sensor of semiconductor material having a current flow therethrough and an indicator connected to the sensor to note the change in current caused by the tested magnetic field acting on the sensor.
(1) Note. Subject matter of this subclass type includes, for example, p-n junction semi-conductor sensors wherein the current flow therethrough is used to indicate the magnetic field.
SEE OR SEARCH THIS CLASS, SUBCLASS:
207.21, for magnetic displacement measurement wherein a sensor is magnetoresistive.
228, for noncoil type magnetic sensors including transistors and other solid-state magnetic sensors responsive to a magnetic field modified by a tested material.
SEE OR SEARCH CLASS
257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), appropriate subclasses, including 108, 414, and 421-427, for devices responsive to magnetic field.
323, Electricity: Power Supply or Regulation Systems, for circuits including active solid-state devices controlled by a magnetic field which controls the voltage or current in the circuits.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
510+, for miscellaneous circuits and systems subjected to external magnetic effects.
330, Amplifiers,
62, for magneto-resistive-type amplifiers.
338, Electrical Resistors,
32, for magnetic field-type resistors.
360, Dynamic Magnetic Information Storage or Retrieval,
113, for information type magnetoresistive transducer structures.
361, Electricity: Electrical Systems and Devices,
235, for control circuits for electromagnetic devices having barrier layer devices controlled by a magnetic field. 365, Static Information Storage and Retrieval,
