公开(公告)号：US11761992B2

公开(公告)日：2023-09-19

申请号：US17664522

申请日：2022-05-23

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Angelini ,  Roberto Pio Baorda ,  Francesco Borgioli

IPC: G01R19/00 ,  H02J50/12 ,  G01R1/20 ,  G01R19/165

CPC classification number: G01R19/0092 ,  G01R1/203 ,  G01R19/16533 ,  H02J50/12 ,  H03F2200/481

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

公开(公告)号：US20220283202A1

公开(公告)日：2022-09-08

申请号：US17664522

申请日：2022-05-23

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Angelini ,  Roberto Pio Baorda ,  Francesco Borgioli

IPC: G01R19/00 ,  H02J50/12 ,  G01R1/20 ,  G01R19/165

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

公开(公告)号：US11366140B2

公开(公告)日：2022-06-21

申请号：US17102037

申请日：2020-11-23

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Angelini ,  Roberto Pio Baorda ,  Francesco Borgioli ,  Marco Garbarino

IPC: G01R19/00 ,  H02J50/12 ,  G01R1/20 ,  G01R19/165

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

公开(公告)号：US20210165023A1

公开(公告)日：2021-06-03

申请号：US17102037

申请日：2020-11-23

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Angelini ,  Roberto Pio Baorda ,  Francesco Borgioli ,  Marco Garbarino

IPC: G01R19/00 ,  G01R19/165 ,  H02J50/12 ,  G01R1/20

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.