公开(公告)号：US20240146324A1

公开(公告)日：2024-05-02

申请号：US18482333

申请日：2023-10-06

Applicant: STMicroelectronics International N.V.

Inventor： Ankur BAL ,  Anubhuti CHOPRA

IPC: H03M1/10

CPC classification number: H03M1/1028 ,  H03M1/1038

Abstract: Offset calibration for an analog front-end system is provided. The analog front-end system includes a variable-gain amplifier, and the calibration mitigates an offset error of the variable-gain amplifier. Calibration is based on a difference-based estimation technique combined with digital iteration. Difference-based estimation includes measuring different digital output signals from an analog-to-digital converter for different respective gains of the variable-gain amplifier. The digital iteration is utilized to estimate offsets values which converge a digital output difference to a target of zero volts.