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A NOVEL WIDEBAND CMOS VCO USING SWITCH CAPACITORS ARRAY FOR RF APPLICATIONS

MOHAMMAD NIABOLI-GUILANI

Department of Electrical Engineering, Roudbar Branch, Islamic Azad University, Roudbar, Iran

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MAHROKH MAGHSOODI

Department of Electrical Engineering, University of Guilan. Rasht, Guilan, Iran

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ALIREZA SABERKARI

Department of Electrical Engineering, University of Guilan. Rasht, Guilan, Iran

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, and

REZA MESHKIN

Department of Electrical Engineering, Lashtenesha-Zibakenar Branch, Islamic Azad University, Lashtenesha, Iran

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https://doi.org/10.1142/S0218126612500466Cited by:0 (Source: Crossref)

Abstract

This paper presents a novel low power consumption, low phase noise, and high tuning range CMOS cross-coupled voltage-controlled oscillator (VCO). Using common mode double-pseudo-resistance technique in the proposed circuit leads to low power dissipation without degrading the phase noise. Additionally, band-switching capacitor array is employed in order to increase the tuning range. The schematic circuit of the proposed VCO is simulated in 0.18 μm 1P6M CMOS process and simulation results show high efficiency of the proposed circuit. The overall tuning frequency range is from 1.7 GHz to 3.18 GHz (59%) with tuning voltage variation range from 0 V to 1.5 V. The proposed VCO circuit has phase noise of -102.6 and -124.3 dBc/Hz at 100 KHz and 1 MHz offset frequency from the carrier, respectively, while consumes 1.98 mW power at 1.5 V supply voltage.

This paper was recommended by Regional Editor Piero Malcovati.

Keywords:

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