公开(公告)号：US20240250693A1

公开(公告)日：2024-07-25

申请号：US18402964

申请日：2024-01-03

Applicant: Infineon Technologies AG

Inventor： Andrei-Sorin GHEORGHE ,  Dan Ioan Dumitru STOICA ,  Ilie-Ionut CRISTEA

IPC: H03M3/00 ,  G01R33/07

CPC classification number: H03M3/464 ,  H03M3/496 ,  G01R33/075

Abstract: The present disclosure proposes a sigma-delta analog-to-digital converter for converting an analog input signal to a digital output signal at a sampling frequency (fs). The sigma-delta analog-to-digital converter includes a chopper circuit configured to shift the analog input signal from an original frequency to a chopper frequency (fchop=fs/N) to generate a chopped analog signal, where N is a positive integer with N≥1. A chopper period includes a first chopper phase and a second chopper phase. The sigma-delta analog-to-digital converter also includes a timing circuit configured to adjust at least one of a duration of the first chopper phase or a duration of the second chopper phases according to (N/2−k)·Ts, with k being an odd integer equal to or larger than 1, and Ts being a sampling period 1/fs of the sigma-delta analog-to-digital converter.