High bandwidth current sensor and method therefor
First Claim
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1. A current sensor comprising,a current carrying trace located within a first metal layer of the substrate;
- anda first sensing trace located within a second metal layer of the substrate proximate to the current carrying trace;
a second sensing trace located within a third metal layer of the substrate proximate to the current carrying trace, whereinthe first metal layer is between the second metal layer and the third metal layer,the first sensing trace is looped in the same direction as the first sensing trace, anda first end of the first sensing trace is connected to a first end of the second sensing trace with a via between the second and third metal layers of the substrate;
a sensing circuit, coupled to a second end of the first sensing trace and a second end of the second sensing trace, the sensing circuit configured to detect an electromagnetic force (emf) generated by magnetic flux inductively coupled from the current carrying trace to the first and second sensing traces.
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Abstract
A current sensor comprises a current carrying trace located within a substrate; and a sensing trace located within the substrate proximate to the current carrying trace; wherein the sensing trace detects an electromagnetic force (emf) generated by magnetic flux inductively coupled from the current carrying trace for transmitting to a current sensing device.
13 Citations
14 Claims
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1. A current sensor comprising,
a current carrying trace located within a first metal layer of the substrate; - and
a first sensing trace located within a second metal layer of the substrate proximate to the current carrying trace; a second sensing trace located within a third metal layer of the substrate proximate to the current carrying trace, wherein the first metal layer is between the second metal layer and the third metal layer, the first sensing trace is looped in the same direction as the first sensing trace, and a first end of the first sensing trace is connected to a first end of the second sensing trace with a via between the second and third metal layers of the substrate; a sensing circuit, coupled to a second end of the first sensing trace and a second end of the second sensing trace, the sensing circuit configured to detect an electromagnetic force (emf) generated by magnetic flux inductively coupled from the current carrying trace to the first and second sensing traces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of detecting current within a substrate comprising:
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detecting an electromagnetic force (emf) generated by magnetic flux inductively coupled from a current carrying trace to a first sensor trace and a second sensor trace located within the substrate, wherein the first sensor trace is contained within a first metal layer of the substrate, the second sensor trace is contained with a second metal layer of the substrate and the current carrying trace is contained with a third metal layer of the substrate, wherein the third metal layer is between the first and second metal layers; and transmitting the emf to a sensing device.
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Specification