公开(公告)号：US20190187739A1

公开(公告)日：2019-06-20

申请号：US16220762

申请日：2018-12-14

申请人： ABLIC Inc.

发明人： Masakazu SUGIURA ,  Atsushi IGARASHI ,  Nao OTSUKA

IPC分类号： G05F3/26 ,  G05F3/24 ,  G05F3/30

CPC分类号： G05F3/262 ,  G05F3/24 ,  G05F3/30

摘要： A current generation circuit includes: a current source circuit including a first transistor and a first resistor, and configured to output a first current based on a source voltage or a drain voltage of the first transistor and a resistance of the first resistor; a current control circuit including a voltage input terminal, a second transistor and a third transistor, and configured to output a second current based on a source voltage of the second transistor and a resistance of the third transistor; and an impedance circuit including a second resistor formed of a same resistive body as the first resistor and a fourth transistor diode-connected to the second resistor, and configured to generate a control voltage at the voltage input terminal by the first current and the second current, wherein the current generation circuit is configured to output a current based on the second current.

公开(公告)号：US20210270915A1

公开(公告)日：2021-09-02

申请号：US17183375

申请日：2021-02-24

申请人： ABLIC Inc.

发明人： Hirotaka UEMURA ,  Atsushi IGARASHI ,  Takahiro KATO

IPC分类号： G01R33/09 ,  G01R33/07 ,  H01L43/06 ,  H01L43/04

摘要： A magnetic sensor has a Hall IC that has a Hall element formed on a surface of the Hall IC, and a lead frame that supports the Hall IC. The lead frame includes a first region that is disposed in the vicinity of the Hall element and generates a first magnetic field due to a first eddy current generated when a measurement target magnetic field is applied, and second regions that are disposed away from the first region and generate a second magnetic field having an intensity that cancels the first magnetic field by means of second eddy currents generated when the measurement target magnetic field is applied.