公开(公告)号：US20220163572A1

公开(公告)日：2022-05-26

申请号：US17670858

申请日：2022-02-14

Applicant: STMicroelectronics S.r.l.

Inventor： Michele VAIANA ,  Calogero Marco IPPOLITO ,  Angelo RECCHIA ,  Antonio CICERO ,  Pierpaolo LOMBARDO

IPC: G01R19/00 ,  G05F3/08 ,  H03B5/04 ,  H03F1/02 ,  H03F3/45

Abstract: An amplification interface includes first and second differential input terminals, first and second differential output terminals providing first and second output voltages defining a differential output signal, and first and second analog integrators coupled between the first and second differential input terminals and the first and second differential output terminals, the first and second analog integrators being resettable by a reset signal. A control circuit generates the reset signal such that the first and second analog integrators are periodically reset during a reset interval and activated during a measurement interval, receives a control signal indicative of offsets in the measurement sensor current and the reference sensor current, and generates a drive signal as a function of the control signal. First and second current generators coupled first and second compensation circuits to the first and second differential input terminals as a function of a drive signal.

公开(公告)号：US20200256898A1

公开(公告)日：2020-08-13

申请号：US16781598

申请日：2020-02-04

Applicant: STMicroelectronics S.r.l.

Inventor： Michele VAIANA ,  Calogero Marco IPPOLITO ,  Angelo RECCHIA ,  Antonio CICERO ,  Pierpaolo LOMBARDO

IPC: G01R19/00 ,  H03F3/45 ,  H03B5/04 ,  G05F3/08 ,  H03F1/02

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.