Peak magnetic field detector with non-volatile storage
AssigneeHoneywell Inc.
InventorsJeffrey S. Haviland, Donald R. Krahn, Robert W. Schneider
Life of this patent
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Abstract
A peak current detecting and non-volatile storage device has a substrate having a hole. Individual magnetic field detecting elements are located on the substrate and are radially displaced from the hole. A conductor extends through the hole. The magnetic field detecting elements are magnetized to a predetermined state. Current carried by the conductor creates a magnetic field around the conductor which alters the predetermined state of magnetization of the magnetic field detecting devices. Various readout techniques may be used to determine the altered state of magnetization which is representative of the magnetic field and may be easily related to the current.
Claims20
Device for detecting a magnetic field and storing the value of said magnetic field, said device comprising:
- a substrate;
- individual magnetic field detecting elements spatially distributed at fixed locations on said substrate, said individual magnetic field detecting elements being in a predetermined first state of magnetization prior to exposure to said magnetic field;
- means for exposing said individual elements to said magnetic field, said magnetic field altering said predetermined first state of magnetization in at least one of said individual magnetic field detecting elements to a second state of magnetization, said second state of magnetization being representative of said value of said magnetic field.
Device of claim 9 wherein said discrete radially displaced elements are formed in a first row extending in a first direction from said hole.
Device for detecting a magnetic field due to a current in an electrical conductor and storing the value of said magnetic field, said device comprising:
- a substrate having a hole therethrough, said electrical conductor extending through said hole, said electrical conductor substantially perpendicular to said substrate;
- individual magnetic field detecting elements spatially distributed at fixed locations on said substrate, said individual magnetic field detecting elements being in a predetermined first state of magnetization prior to exposure to said magnetic field;
- said magnetic field altering said predetermined first state of magnetization in at least one of said individual magnetic field detecting elements to a second state of magnetization, said second state of magnetization being representative of said value of said magnetic field and said current.
Dependencies are inferred from the claim text.