公开(公告)号：DE102004031447A1

公开(公告)日：2006-01-19

申请号：DE102004031447

申请日：2004-06-29

Applicant: INFINEON TECHNOLOGIES AG

Inventor： GIANDOMENICO ANTONIO DI ,  WIESBAUER ANDREAS ,  CLARA MARTIN ,  KOLHAUPT KLAUS ,  PATON SUSANA

IPC: H03M3/00

Abstract: Scrambling devices (15) rotate the digital output signal of the sigma delta encoder (1) as a function of a computed current pointer. Pointer computation pipeline mechanisms (16) calculate the value of the current pointer P(n+1) as a function of a preceding pointer P(n) and preceding output data D(n). The preceding pointer and the preceding output data are delayed by at least one clock cycle. Preferably the current pointer is computed from the sum of the preceding pointer and preceding output data. Independent claims are included for : (1) a sigma-delta analog-digital converter for converting an applied analog input signal into digital output data; and (2) a method for calculating a current value pointer for a data-weighting device forming an average value within a sigma-delta analog-digital converter.