A novel low-voltage reconfigurable ΣΔ modulator for 4G wireless receivers

Description

This paper presents a new adaptable cascade ΣΔ modulator architecture fo r low-voltage multi-stan- dard applications. It uses two reconfiguration strategies: a programmable global resonation and a variable loop-filter order. These techniques are properly com- bined in a novel topology that allows to increase the effec- tive resolution in a given bandwidth, whereas keeping relaxed output swing requirements and high robustness to mismatch and to non-linearities of the amplifiers. Time-domain simulations incl uding the main circuit-level non-idealities are shown to demonstrate the benefits of the presented modulator when it is configured to cope with the requirements of GSM, UMTS, WLAN and Wi-Max.

Abstract

España, Ministerio de Educación y Ciencia TEC2007-67247-C02-01/MIC

Abstract

España, Ministerio de Innovación, Ciencia y Empresa, Junta de Andalucía TIC-2532

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