Invention Grant
- Patent Title: Amplification interface, and corresponding measurement system and method for calibrating an amplification interface
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Application No.: US16781598Application Date: 2020-02-04
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Publication No.: US11275100B2Publication Date: 2022-03-15
- Inventor: Michele Vaiana , Calogero Marco Ippolito , Angelo Recchia , Antonio Cicero , Pierpaolo Lombardo
- 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: Crowe & Dunlevy
- Priority: IT102019000001847 20190208
- Main IPC: H03F1/02
- IPC: H03F1/02 ; G01R19/00 ; G05F3/08 ; H03B5/04 ; H03F3/45

Abstract:
An amplification interface includes an input terminal receiving a sensor current and an output terminal supplying an output voltage. An analog integrator is connected to the input terminal and supplies the output voltage. A current generator is connected to the input of the analog integrator and generates a compensation current based on a drive signal. A control circuit generates the drive signal for the current generator based on a control signal representing an offset in the sensor current supplied by the sensor. The current generator generates, based on the driving signal, a positive or negative current. The control circuit determines a first duration and a second duration as a function of the control signal representing the offset in the sensor current, during the measurement interval, and sets the driving signal to a first logic value for the first duration and to a second logic value for the second duration.
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Information query
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