公开(公告)号：US20220302890A1

公开(公告)日：2022-09-22

申请号：US17687079

申请日：2022-03-04

Applicant: STMicroelectronics S.r.l.

Inventor： Calogero Marco IPPOLITO ,  Michele VAIANA

IPC: H03F3/45

Abstract: An electronic amplification-interface circuit includes a differential-current reading circuit having a first input terminal and a second input terminal. The differential-current reading circuit includes a continuous-time sigma-delta conversion circuit formed by an integrator-and-adder module generating an output signal that is coupled to an input of a multilevel-quantizer circuit configured to output a multilevel quantized signal. The integrator-and-adder module includes a differential current-integrator circuit configured to output a voltage proportional to an integral of a difference between currents received at the first and second input terminals. A digital-to-analog converter, driven by a respective reference current, receives and converts the multilevel quantized signal into a differential analog feedback signal. The integrator-and-adder module adds the differential analog feedback signal to the differential signal formed at the first and second input terminals.

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.