A single Op-Amp 0+2 sigma-delta modulator

Abstract

This paper describes a single op-amp 0+2 ΣΔ architecture and design considerations to achieve 12-b resolution on a 2-MHz bandwidth. The proposed topology combines op-amp reduction and MASH techniques. In particular, the second-order ΣΔ stage uses direct synthesis of the noise transfer function (NTF) and employs only one op-amp. The use of multi-bit… (More)
DOI: 10.1109/ISCAS.2015.7169075

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