Optimization for sigma-delta modulators

The performance of a higher-order single-stage sigma-delta modulator (ΣΔM) is determined by the loop filter in which the quantizer is embedded. Not the coefficients in the loop filter themselves, but ratios of them determine the input-output relationship in the modulator and thus its performance. The ratios of coefficients that affect the performance of the ΣΔM are found, thus establishing a search space for optimization of the modulators. An optimization method of the random search type is presented and used for optimizing the ΣΔM to any particular input