An Approach to the Design of Multistandard ΣΔ Modulators
نویسنده
چکیده
This paper discusses issues concerning the design of cascade sigma-delta modulators intended for multistandard wireless receivers. Four standards are covered: GSM, Bluetooth, UMTS, and WLAN. A top-down design methodology is proposed to find out the optimum modulator topology in terms of circuit complexity and reconfiguration parameters. Several reconfiguration strategies are adopted at both architectureand circuit-level in order to adapt the modulator performance to the standards requirements with adaptive power consumption. Time-domain behavioural simulations are shown to validate the presented approach. Key-Words: Data converters, Sigma-Delta, Wireless, Multistandard
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