Current sensor with extended voltage range

    公开(公告)号:US10295577B1

    公开(公告)日:2019-05-21

    申请号:US16202864

    申请日:2018-11-28

    Inventor: Sandor Petenyi

    Abstract: In an embodiment, a current sense circuit includes a copy transistor having a gate configured to be coupled to a gate of an output transistor, and a drain coupled to an input terminal. The drain of the copy transistor is configured to be coupled to a drain of the output transistor. A first transistor has a current path coupled to a current path of the copy transistor. An error amplifier has a non-inverting input coupled to a source of the copy transistor, an inverting input configured to be coupled to a source of the output transistor, an output coupled to a gate of the first transistor, a positive power supply terminal coupled to the input terminal and a negative power supply terminal coupled to a reference supply terminal. A current-to-voltage converter has an input coupled to the current path of the copy transistor.

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