A 5mA CMOS FM Front-End with 39 dB IRR and 52 dB Channel Selectivity

A complete analog front-end, with the exclusion of the frequency synthesizer, for FM broadcasting occupies 2.8 mm 2 active area in a standard 0.35 μm CMOS technology. The use of current driven passive mixer and switch capacitor polyphase filter gives +100 dBμV IIP3, 52 dB adjacent channel selectivity and +39 dB image rejection without trimming or tuning. The output noise is 390 nV//√Hz, with a conversion gain of about 39 dB. This front-end consumes only 5 mA from a 2.4 V supply © 2006 IEEE.