A wideband LC-VCO for MMMS applications

A fully integrated wideband voltage-controlled-oscillator ( VCO) based on current-reused topol-ogy is presented. The overall scheme contains two sub-VCOs, which are controlled by a switch to cov-er a wide output frequency range. Fabricated in TSMC 65 nm CMOS technology, the measured output frequency of the VCO ranges from 3. 991 GHz to 9. 713 GHz,achieving a tuning range of 83. 5％. And the worst and best phase noise at 1 MHz offset are -93. 09 dBc/Hz and -111. 97 dBc/Hz, respectively. With a 1. 2 V supply voltage, the VCO core consumes a current of 3. 7-5. 1 mA across the entire frequency range. The chip area is 0. 51 mm2 , including the pads. Moreover, the proposed VCO provides a figure-of-merit-with-tuning-range ( FOMT ) of -191 dBc/Hz to -197 dBc/Hz.