Design of resource sharing reconfigurable ΔΣ SAR-ADC

Abstract

This paper presents an ADC with re-configurability between SAR-only mode and delta-sigma (ΑΣ assisted mode). The ΑΣ assisted mode brings resolution enhancement. Proposed ADC shares a capacitor array for SAR, feedback DAC, and integrator capacitor in ΑΣ loop, which can reduce the circuit size. The prototype ADC fabricated in 65-nm CMOS achieved SNDR of 44.35… (More)

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