资 源 简 介
In the past decade the wireless industry has attracted the attenTIon ofmany researchers, industrialists, and even investors. The current exponenTIalgrowth of the wireless market requires wireless transceivers withever increasing bandwidth, better quality, lower cost, and longer batterylife. Cellular phones by far consTItute the biggest market for wirelesssystems, but wireless local area network systems are also growing at avery fast pace.UnTIl very recently two limitations of wireless local area network(WLAN) systems have been low data rate and high cost. The formeris being overcome by allocating new frequency bands for WLAN service.Among these are the ISM band at 2.4 GHz and the U–NII bandat 5 GHz. New standards have been developed, with still others underdevelopment, to take advantage of these frequency bands.High integration in low cost technologies is the main step towardreducing the cost of WLAN systems. The fast trend of CMOS scalingmakes it an attractive technology for low cost systems. However, to getthe required RF performance out of standard digital CMOS technologies,new system architectures and circuit topologies need to be developed.Careful studies of wireless architectures identify fundamental limitationsand allow modifications to improve performance while maintaining oreven increasing battery lifetime.The increasing demand for wideband WLAN systems is the motivationfor studying here the design of a fully integrated CMOS receiver at5 GHz. In this book we focus only on the frequency synthesizer anddescribe how new architectures and circuit topologies enable us to reducethe cost and power consumption while achieving high performance.
