Method and sensor for sensing current in a conductor
First Claim
1. A current sensor comprising:
- an inductor for sensing an alternating current signal component of an observed signal, the inductor comprising a multi-layered substrate, a plurality of conductive traces associated with different layers of the substrate, and one or more conductive vias for interconnecting the plurality of conductive traces;
a magnetic field sensor for sensing a direct current signal component of the observed signal;
a first filtering circuit having a high-pass filter response, the first filtering circuit coupled to the inductor to provide a filtered alternating current signal;
a second filtering circuit having a low-pass filter response, the second filtering circuit coupled to the magnetic field sensor to provide a filtered direct current signal; and
a sensor fusion circuit for accepting the filtered alternating current signal and the filtered direct current signal and for determining an aggregate sensed current.
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Accused Products
Abstract
A sensor comprises an inductor for sensing an alternating current signal component of an observed signal. The inductor comprises a substrate, conductive traces associated with different layers of the substrate, and one or more conductive vias for interconnecting the plurality of conductive traces. A magnetic field sensor senses a direct current signal component of the observed signal. A first filtering circuit has a high-pass filter response. The first filtering circuit is coupled to the inductor to provide a filtered alternating current signal component. A second filtering circuit has a low-pass filter response. The second filtering circuit coupled to the magnetic field sensor to provide a filtered direct current signal component. A sensor fusion circuit determines an aggregate sensed current based on the filtered alternating current signal component and the filtered direct current signal component.
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Citations
22 Claims
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1. A current sensor comprising:
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an inductor for sensing an alternating current signal component of an observed signal, the inductor comprising a multi-layered substrate, a plurality of conductive traces associated with different layers of the substrate, and one or more conductive vias for interconnecting the plurality of conductive traces; a magnetic field sensor for sensing a direct current signal component of the observed signal; a first filtering circuit having a high-pass filter response, the first filtering circuit coupled to the inductor to provide a filtered alternating current signal; a second filtering circuit having a low-pass filter response, the second filtering circuit coupled to the magnetic field sensor to provide a filtered direct current signal; and a sensor fusion circuit for accepting the filtered alternating current signal and the filtered direct current signal and for determining an aggregate sensed current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for sensing current, the method comprising:
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sensing, via an inductor, an alternating current signal component of an observed signal, the inductor comprising a substrate, a plurality of conductive traces associated with different layers of the substrate, and one or more conductive vias for interconnecting the plurality of conductive traces; sensing a direct current signal component of the observed signal; filtering the alternating current signal component with a high-pass filter response to provide a filtered alternating current signal; filtering the direct current signal component with a low pass filter response to provide a filtered direct current signal; and determining an aggregate sensed current by combining the filtered alternating current signal and the filtered direct current signal. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification