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Current and future trends in the development of chip§sets for 3G and 4G mobile handhelds call for§achieving the highest performance/price ratio which§means the development of feature-rich multi-mode§wireless devices while maintaining the cost of adding§more features at a minimum. In this book, a novel§compact wireless radio transceiver architecture§reusing a baseband chain so as to significantly§reduce the die area is proposed. To realize a high§performance direct conversion receiver for multi-mode§wireless communications, certain limiting factors in§the design should be identified and removed or§mitigated. One of the main factors addressed in this§book is the DC offset problem. Generation mechanisms§for DC offsets, both static and dynamic, are modeled§and DC offset cancellation schemes are proposed. The§design of an analog baseband chain for the proposed§compact wireless transceiver is also presented. This§book is intended for radio and mixed-signal IC§designers, graduate students in electrical and§computer engineering as well as marketing and product§managers of wireless chip sets.