The dawn of the 21st century is witnessing a tremendous demand for wireless (untethered) communications and information services, such as Personal Communications Services (PCS-3G, 4G and beyond), wireless data networks and Internet access, position location, navigation, roadway informatics, and wireless sensor networks. The corresponding explosive growth in wireless communications systems has led to an increased demand for wireless devices which are compact, low-cost., and low-power. To meet this demand, ICs which combine RF, analog, and digital functions on the same chip are required, rapidly approaching system-on-a-chip (SoC) implementations.
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