Invention Grant
- Patent Title: Sensing circuit, corresponding device and method
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Application No.: US17664522Application Date: 2022-05-23
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Publication No.: US11761992B2Publication Date: 2023-09-19
- Inventor: Paolo Angelini , Roberto Pio Baorda , Francesco Borgioli
- Applicant: STMicroelectronics S.r.l.
- Applicant Address: IT Agrate Brianza
- Assignee: STMICROELECTRONICS S.R.L
- Current Assignee: STMICROELECTRONICS S.R.L
- Current Assignee Address: IT Agrate Brianza
- Agency: Slater Matsil, LLP
- The original application number of the division: US17102037 2020.11.23
- Main IPC: G01R19/00
- 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.
Public/Granted literature
- US20220283202A1 SENSING CIRCUIT, CORRESPONDING DEVICE AND METHOD Public/Granted day:2022-09-08
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