A Wide Tuning Range and Low Phase Noise VCO using New Capacitor Bank Structure

Majlesi Journal of Electrical Engineering

مقاله 13، دوره 12، شماره 4، اسفند 2018، صفحه 95-103   

نوع مقاله: Review Article

نویسندگان

Mostafa Katebi؛ Abbas Nasri؛ Siroos Toofan^*

University of Zanjan

چکیده

This paper presents a wide tuning range, and low noise voltage controlled oscillator (VCO) based on cross-coupled and colpitts structures. The advantages of this work provide a low-phase noise and robust start-up condition, leading to minimized the dc power. In addition, a new structure of capacitor bank is used in this structure to achieve a wide range of frequency. The proposed circuit is simulated in 0.18 µm CMOS process. The designed VCO covers the frequency range of 21.95 GHz to 24 GHz with a tuning range of 8.9%. Simulation results show that the phase noise is -120.5 dBc/Hz at 1MHz offset frequency for 23GHz carrier frequency.  Also, power consume of the VCO is 6.34 mW under 1.8 supply voltage, and the figure-of-merit is -191.68 dBc/Hz.

کلیدواژه‌ها

voltage controlled oscillator؛ VCO؛ Capacitor Bank؛ low noise؛ wide tuning

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