A new fully integrated CMOS quadrature voltage-controlled oscillator (VCO) realized in a standard 0.5 μm double poly double metal (DPDM) CMOS technology is proposed, that combines a fully differential two-stage ring oscillator with LC tanks and negative resistance to provide both inphase and quadrature output signals. The phase noise is low due to the use of the resonator-type oscillator. The simulation results show that with an on-chip varactor tuned resonator and a control voltage of 0-3 V, the tuning range of the VCO is 160 MHz from 1.67 GHz to 1.83 GHz. Under 1% mismatch of the inductor or capacitor, the phase error of VCO outputs are less than 1° from perfect quadrature and the amplitude ratio are less than 1.0007. The power dissipation is 35 mW for 3 V power supply. The area is 1.3×0.9 mm2, dominated by the two integrated spiral inductors.
|Number of pages||4|
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|State||Published - 1 Jan 1998|
|Event||Proceedings of the 1998 IEEE International Symposium on Circuits and Systems, ISCAS. Part 5 (of 6) - Monterey, CA, USA|
Duration: 31 May 1998 → 3 Jun 1998