MAGNETIC-FIELD BIOSENSOR MEASURING A DIFFERENTIAL SIGNAL FROM AT LEAST TWO MAGNETIC-FIELD SENSING ELEMENTS
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Jul 20, 2023
filing date -
Jul 20, 2023
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Abstract
In one aspect, a magnetic-field biosensor includes an insulator and a plurality of magnetic-field sensing elements that includes a first and a second magnetic-field sensing elements. The insulator has a first and a second plurality of portions, and the second plurality of portions is thicker than the first plurality of portions. The magnetic-field biosensor further includes a first receptor configured to attach to biological material and being on a first portion of the first plurality of portions and directly above the first magnetic-field sensing element; and a second receptor configured to attach to the biological material and being on a first portion of the second plurality of portions and directly above the second magnetic-field sensing element. Outputs of the first and the second magnetic-field sensing elements are used to sense a magnetic field from a first magnetic nanoparticle by reducing an effect of an applied magnetic field.
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