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Complete BAW filtered CMOS 90nm digital RF signal generator

This paper presents the first demonstration of a complete CMOS 90nm digital RF signal generator for wireless communication systems including a BAW (Bulk Acoustic Wave) based filter. A 1-bit delta-sigma signal generator is assembled with a BAW band pass filter for the UMTS TX-band at 1.95GHz. The system satisfies UMTS specifications for ACPR and spurious emissions as defined in the IST MOBILIS project. The CMOS and BAW chip sizes are respectively 3.2mm² and 4.7mm².