Sigma-delta modulator arrangement, method and control apparatus for calibrating continuous-time sigma-delta modulator

摘要

The sigma-delta modulator structure (100) comprises a continuous-time sigma-delta modulator (CT_SDM) having at least one modulator stage, a digital integrator (Int_d), and a given number of switches (Sw 1,..., Sw 8). These switches (Sw1, ..., Sw8) connect this sigma-delta modulator (CT_SDM) to a single primary incremental sigma-delta analog-to-digital converter (INC_ADC ). As shown in FIG. At least a first modulator stage (M_ 1) of the continuous-time sigma-delta modulator is coupled to an input of the continuous-time sigma-delta modulator (CT_SDM) and supplied to the first modulator stage At least one tuning element for tuning the input signal and / or the feedback signal that is being processed.(FIG.