公开(公告)号：US20220170795A1

公开(公告)日：2022-06-02

申请号：US17537074

申请日：2021-11-29

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Giuseppe BRUNO ,  Michele VAIANA ,  Maria Eloisa CASTAGNA ,  Angelo RECCHIA

IPC: G01J5/24 ,  H01L29/84 ,  G01J5/48 ,  G01J5/14

Abstract: A thermographic sensor is proposed. The thermographic sensor includes one or more thermo-couples, each for providing a sensing voltage depending on a difference between a temperature of a hot joint and a temperature of a cold joint of the thermo-couple; the thermographic sensor further comprises one or more sensing transistors, each driven according to the sensing voltages of one or more corresponding thermo-couples for providing a sensing electrical signal depending on its temperature and on the corresponding sensing voltages. A thermographic device including the thermographic sensor and a corresponding signal processing circuit, and a system including one or more thermographic devices are also proposed.

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：US20200259474A1

公开(公告)日：2020-08-13

申请号：US16781493

申请日：2020-02-04

Applicant: STMicroelectronics S.r.l.

Inventor： Calogero Marco IPPOLITO ,  Michele VAIANA ,  Angelo RECCHIA

IPC: H03F3/45 ,  G05F3/24 ,  G06G7/186 ,  H03B5/24 ,  H03F3/393

Abstract: An amplification interface includes a drain of a first FET connected to a first node, a drain of a second FET connected to a second node, and sources of the first and second FETs connected to a third node. First and second bias-current generators are connected to the first and second nodes. A third FET is connected between the third node and a reference voltage. A regulation circuit drives the gate of the third FET to regulate the common mode of the voltage at the first node and the voltage at the second node to a desired value. A current generator applies a correction current to the first and/or second node. A differential current integrator has a first and second inputs connected to the second and first nodes. The integrator supplies a voltage representing the integral of the difference between the currents received at the second and first inputs.

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.