Systems and methods for a high isolation current sensor
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United States of America Patent
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May 1, 2018
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app pub date -
Dec 20, 2016
filing date -
Dec 20, 2016
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Abstract
Systems and methods are described herein for creating a high isolation integrated current sensor whereby a portion of a current to be sensed by a magnetic field sensing circuit is split within the current sensor. The current sensor includes a primary conductor configured to carry a first portion of a primary current and a semiconductor substrate having a first surface and a second opposing surface. The first surface supports a magnetic field sensing circuit. The current sensor includes a first insulation layer disposed over the first surface, a conductive layer disposed over the first insulation layer and at least two interconnects coupled between the primary conductor and the conductive layer. A second portion of the primary current can flow through the conductive layer and the magnetic field sensing circuit is configured to sense the second portion of primary current.
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