A 5.6-mW power dissipation CMOS frequency synthesizer for L1/L2 dual-band GPS application

This paper presents a wide tuning range CMOS frequency synthesizer for dual-band GPS receiver, which has been fabricated in a standard 0.18-um RF CMOS process. With a high Q on-chip inductor, the wideband VCO shows a tuning range from 2 to 3.6 GHz to cover 2.45 GHz and 3.14 GHz in case of process corner or temperature variation, with a current consumption varying accordingly from 0.8 mA to 0.4 mA, from a 1.8 V supply voltage. The measurement results show that the whole frequency synthesizer costs a very low power consumption of 5.6 mW working at L1 band with in-band phase noise less than -82 dBc/Hz and out-of-band phase noise about -112 dBc/Hz at 1 MHz offset from a 3.142 GHz carrier.