FRC: a method for extending the resolution of Nyquist rateconverters using oversampling

摘要

Nyquist rate converters have traditionally been used for low tonmoderate resolution data acquisition applications. In this paper, wendescribe a feedforward residue compensation (FRC) technique to extendnthe resolution of such converters using an oversampling modulator loop.nClosed-form analytical expressions are developed to provide insight intonthe operation and limits on the resolution of such converters.nSimulation results are used to verify the operation and confirm thenlimitations of this technique