公开(公告)号：US20200319272A1

公开(公告)日：2020-10-08

申请号：US16372603

申请日：2019-04-02

Applicant: Allegro MicroSystems, LLC

Inventor： Hernán D. Romero ,  Roman Prochazka ,  Martin Drinovsky

IPC: G01R33/07 ,  G01R33/00 ,  H03H19/00 ,  H03F3/00

Abstract: Magnetic field sensors and associated techniques use a Hall effect element in a current spinning arrangement in combination with a rippled reduction feedback network configured to reduce undesirable spectral components generated by the current spinning and other circuit elements.

公开(公告)号：US11047933B2

公开(公告)日：2021-06-29

申请号：US16372603

申请日：2019-04-02

Applicant: Allegro MicroSystems, LLC

Inventor： Hernán D. Romero ,  Roman Prochazka ,  Martin Drinovsky

IPC: G01R33/07 ,  H03F3/00 ,  H03H19/00 ,  G01R33/00

Abstract: Magnetic field sensors and associated techniques use a Hall effect element in a current spinning arrangement in combination with a rippled reduction feedback network configured to reduce undesirable spectral components generated by the current spinning and other circuit elements.

公开(公告)号：US11303257B2

公开(公告)日：2022-04-12

申请号：US16365855

申请日：2019-03-27

Applicant: Allegro MicroSystems, LLC

Inventor： Steven Daubert ,  David J. Haas ,  Craig S. Petrie ,  Milan Valenta ,  Roman Prochazka ,  Richard Stary ,  Sina Haji Alizad

IPC: H03F3/45 ,  G01R19/00 ,  G05F1/625 ,  G01R31/36

Abstract: A current sensor integrated circuit to sense a current through a resistor includes a substrate, a tub disposed in the substrate, an analog front end disposed in the tub and comprising an amplifier having inputs coupled across the resistor and a charging circuit configured to bias the analog front end and the tub to a bias voltage that is a predetermined offset voltage greater than a common mode voltage associated with the resistor. In embodiments, the analog front end is biased to a first bias voltage and the tub is biased to a second, different bias voltage.

公开(公告)号：US20200313637A1

公开(公告)日：2020-10-01

申请号：US16365855

申请日：2019-03-27

Applicant: Allegro MicroSystems, LLC

Inventor： Steven Daubert ,  David J. Haas ,  Craig S. Petrie ,  Milan Valenta ,  Roman Prochazka ,  Richard Stary ,  Sina Haji Alizad

IPC: H03F3/45 ,  G01R19/00 ,  G05F1/625

Abstract: A current sensor integrated circuit to sense a current through a resistor includes a substrate, a tub disposed in the substrate, an analog front end disposed in the tub and comprising an amplifier having inputs coupled across the resistor and a charging circuit configured to bias the analog front end and the tub to a bias voltage that is a predetermined offset voltage greater than a common mode voltage associated with the resistor. In embodiments, the analog front end is biased to a first bias voltage and the tub is biased to a second, different bias voltage.