Wide Tuning Range CMOS Colpitts VCO Based on Tunable Active Inductor

Majlesi Journal of Telecommunication Devices

مقاله 7، دوره 1، شماره 1، خرداد 2012   

نوع مقاله: Articles

چکیده

In this paper, a new differential Colpitts voltage-controlled oscillator (VCO) is presented. The VCO is based on the gm-boosted structure to relax the oscillation start-up current requirement and reduce the DC power consumption in comparison to conventional Colpitts structures. In the proposed VCO, a tunable active inductor is utilized as a part of LC tank instead of passive inductor with constant inductance. The proposed VCO is designed and simulated in ADS in a 0.18μm CMOS process. Simulation results indicate that the proposed VCO has a wide tuning range in comparison to other reported designs while consumes less DC power.

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