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

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  • Mostafa Katebi1,
  • Abbas Nasri1,
  • Siroos Toofan1,
  1. University of Zanjan

Published in Issue 2024-02-15

How to Cite

Katebi, M., Nasri, A., & Toofan, S. (2024). A Wide Tuning Range and Low Phase Noise VCO using New Capacitor Bank Structure. Majlesi Journal of Electrical Engineering, 12(4). https://oiccpress.com/mjee/article/view/4846

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Abstract

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.

Keywords

  • Capacitor Bank,
  • low noise,
  • VCO,
  • Voltage controlled oscillator,
  • wide tuning.
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