Cascade ΣΔ modulator with digital correction for finite amplifier gain effects

Description

This paper presents a simple and fully digital solution to correct the effect of amplifier finite gain in cascade ΣΔ modulators. The main contribution of this letter is a simple digital method to evaluate the integrator pole errors, which are further taken into account to modify the reconstruction filter. The method is applied to a 2-1 cascade modulator.

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