A triple-mode reconfigurable sigma-delta modulator for multi-standard wireless applications

Authors:
Alonso Morgado;Rocío del Río;José M. de la Rosa
Affiliations:
Universidad de Sevilla, Sevilla, Spain;Universidad de Sevilla, Sevilla, Spain;Universidad de Sevilla, Sevilla, Spain
Venue:
Proceedings of the conference on Design, automation and test in Europe
Year:
2008

Citing 2
Cited 0

A low-power sigma-delta modulator for wireless communication receivers using adaptive biasing circuitry and cascaded comparator scheme

Analog Integrated Circuits and Signal Processing
Toward a generic "always best connected" capability in integrated WLAN/UMTS cellular mobile networks (and beyond)

IEEE Wireless Communications

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Abstract

This paper presents the implementation and experimental characterization of a reconfigurable ΣΔ modulator intended for multi-mode wireless receivers that is capable to perform the analog-to-digital conversion for GSM, Bluetooth, and UMTS standards. The ΣΔ modulator reconfigures its cascade topology and building blocks in order to adapt the performance to the diverse standard specifications with optimized power consumption. The prototype has been implemented in a 130-nm CMOS technology and features dynamic ranges of 86.7/81.0/63.3dB and peak signal-to-(noise+distortion) ratios of 74.0/68.4/52.8dB at 400ksps/2Msps/8Msps, respectively. The modulator power consumption is 25.2/25.0/44.5mW, of which 11.0/10.5/24.8mW are dissipated in the analog circuitry.