Dual data weighted average dynamic element matching in analog-to-digital converters

摘要

Methods and systems to provide dynamic element matching (DEM) in multi-phase sample systems include multiple uncorrelated, dual data weighted averaging, dynamic element matching (DDWA DEM). DDWA DEM may be implemented in a multiple-phase sample system in which sample paths and feedback paths share capacitances. Compensation feedback is apportioned amongst corresponding banks of capacitive sample circuits to utilize the capacitive sample circuits within each bank substantially equally over multiple sample cycles. The apportioning is substantially un-correlated between banks, which may reduce in-band quantization noise folding. DDWA DEM may be implemented within a digital-to-analog converter (DAC), in a delta-sigma modulator.