Integrated linear current sense circuitry for semiconductor transistor devices
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United States of America Patent
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May 29, 2018
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May 13, 2016
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May 13, 2016
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Abstract
An integrated circuit (IC) for sensing a current flowing through a transistor device includes a substrate and a current scaling circuit that includes first and second MOSFET devices. The first MOSFET device has a drain coupled to the switched FET at a first node and a source coupled to the substrate. The second MOSFET device has a source coupled to the substrate and a drain coupled to a second node. The first MOSFET device has a channel size that is K times larger than the second MOSFET device. Circuitry is included that equalizes a voltage across both the first MOSFET device and the second MOSFET device.
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