A Fully Integrated Multi-Band Lcvco Based on CMOS Technology

In this paper, a cross-coupled complementary inductance–capacitance voltage controlled oscillator (LCVCO) with low phase noise and wide tuning range is presented. It has a multi-band topology and was fabricated with RF CMOS technology. For the purpose of lowering the KVCO and reducing the nonlinearities of varactors, the sizes of the varactors are set small. Also noise filtering technique is adopted to minimize up-conversion of the low frequency noise as well as down-conversion of the high frequency noise, thus the phase noise performance of the VCO is greatly improved. Simulation and experimental results indicate that the LCVCO displays a phase noise of -126.1 dBc at 900 kHz offset in worst case with a tuning range from 1.76 to 1.96 GHz.

[1]  Paavo Väänänen,et al.  VCO Design With On-Chip Calibration System , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  M. Demirkan,et al.  Design of Wide Tuning-Range CMOS VCOs Using Switched Coupled-Inductors , 2008, IEEE Journal of Solid-State Circuits.

[3]  F. Torrisi,et al.  Impact of indirect stability on phase noise performance of fully–integrated LC tuned VCOs , 1999, Proceedings of the 25th European Solid-State Circuits Conference.

[4]  Pietro Andreani,et al.  Tail current noise suppression in RF CMOS VCOs , 2002, IEEE J. Solid State Circuits.

[5]  E. Hegazi,et al.  23.4 A Filtering Technique to Lower Oscillator Phase Noise , 2008 .

[6]  Salvatore Levantino,et al.  A -94 dBc/Hz@100 kHz, fully-integrated, 5-GHz, CMOS VCO with 18% tuning range for Bluetooth applications , 2001, Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169).

[7]  A.M. Niknejad,et al.  A 1.8-GHz LC VCO with 1.3-GHz tuning range and digital amplitude calibration , 2005, IEEE Journal of Solid-State Circuits.

[8]  Svetozar S. Broussev,et al.  Dual-Band LC VCO Architecture With a Fourth-Order Resonator , 2007, IEEE Transactions on Circuits and Systems II: Express Briefs.

[9]  Nanjian Wu,et al.  A novel CMOS low-phase-noise VCO with enlarged tuning range , 2008, 2008 International Conference on Microwave and Millimeter Wave Technology.

[10]  Asad A. Abidi,et al.  RF-CMOS oscillators with switched tuning , 1998, Proceedings of the IEEE 1998 Custom Integrated Circuits Conference (Cat. No.98CH36143).

[11]  A. Hajimiri,et al.  Design issues in CMOS differential LC oscillators , 1999, IEEE J. Solid State Circuits.