公开(公告)号：US10897234B2

公开(公告)日：2021-01-19

申请号：US16361930

申请日：2019-03-22

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Simone Zezza ,  Pasquale Flora

IPC: H03F3/45

Abstract: A method and apparatus for sensing a common mode feedback current are provided. The common mode feedback current may flow through a common mode resistive divider of a piezoresistive bridge. A first current mirror mirrors the common mode feedback current and provides a first mirrored common mode current. A current aggregation stage receives the first mirrored common mode current and determines a bridge current of the piezoresistive bridge based on the first mirrored common mode feedback current. A second current mirror may be used to mirror the first current mirror before determining the bridge current.

公开(公告)号：US20200304085A1

公开(公告)日：2020-09-24

申请号：US16361930

申请日：2019-03-22

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Simone Zezza ,  Pasquale Flora

IPC: H03F3/45

Abstract: A method and apparatus for sensing a common mode feedback current are provided. The common mode feedback current may flow through a common mode resistive divider of a piezoresistive bridge. A first current mirror mirrors the common mode feedback current and provides a first mirrored common mode current. A current aggregation stage receives the first mirrored common mode current and determines a bridge current of the piezoresistive bridge based on the first mirrored common mode feedback current. A second current mirror may be used to mirror the first current mirror before determining the bridge current.