Cross-coupled low-phase-noise 5-GHz CMOS VCO using common-source single-ended output stage

Ram Singh Rana; Dong Shan Hua

doi:10.1117/12.560892

7 April 2004 Cross-coupled low-phase-noise 5-GHz CMOS VCO using common-source single-ended output stage

Ram Singh Rana, Dong Shan Hua

Proceedings Volume 5445, Microwave and Optical Technology 2003; (2004) https://doi.org/10.1117/12.560892
Event: Microwave and Optical Technology 2003, 2003, Ostrava, Czech Republic

Abstract

A 5 GHz fully monolithic Voltage Controlled Oscillator for Wireless Local Area Network applications is presented. It is designed using 0.35 μm CMOS process. The proposed structure uses MOS transistor accumulation mode varactors and small value spiral inductors. Unlike the conventional cross coupled CMOS VCO circuit, the use of common source output stage is exploited to observe its effects on phase noise optimization. The principle of operation of common source topology and its trade-offs with design performance parameters are reviewed. At 2.6 V supply, design simulations indicates phase noise performance of -110.3dBc/Hz at 1 MHz offset and turning range of 15.7% spanning from 4.6 GHz to 5.4 GHz with 2.5 V variation in control voltage. Circuit is simulated using Advanced Design System. Circuit theory with design optimization followed by detailed simulation results and layout is discussed.

Citation Download Citation

Ram Singh Rana and Dong Shan Hua "Cross-coupled low-phase-noise 5-GHz CMOS VCO using common-source single-ended output stage", Proc. SPIE 5445, Microwave and Optical Technology 2003, (7 April 2004); https://doi.org/10.1117/12.560892

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