A 5GHz wide tuning range LC-VCO in sub-micrometer CMOS technology

A 1.2V low-cost voltage-controlled oscillator (VCO) has been implemented in a CMOS/RF 90nm technology. The VCO, which uses a LC- tank topology, has a centre frequency of 5GHz with a 30% tuning range from 4.24GHz to 5.74GHz. Worst case estimations of the phase noise after layout and package parasitic extraction are -98.8dBc/Hz and -115dBc/Hz at 1MHz and 5MHz offsets from the carrier, respectively. The power consumption is 2.52mW and it occupies less than 0.07mm2.