A technique for truly linear LC VCO tuning, a proof of concept

Author

Hanafi, Bassel ; Hegazi, Emad

Author_Institution

Dept. of Electron. & Commun. Eng., Ain Shams Univ., Cairo

fYear

2007

fDate

29-31 Dec. 2007

Firstpage

93

Lastpage

96

Abstract

Based on the understanding of the relation between the shape of the LC VCO tuning curve and the varactor characteristics, a technique using an array of unequal varactors with different bias was found to obtain a truly linear tuning curve. An LC VCO was designed using TSMC 0.13 mum 1.2V/3.3V IO process, the VCO frequency varies from 2 - 2.34 GHz as its control voltage varies from 0 - 1.2V. The tuning gain was K_VCO = 275MHz/Vplusmn6.5%.

Keywords

UHF oscillators; circuit tuning; varactors; voltage-controlled oscillators; IO process; circuit tuning; frequency 2 GHz to 2.34 GHz; linear LC VCO tuning; linear tuning curve; size 0.13 mum; varactor characteristics; voltage 0 V to 1.2 V; voltage-controlled oscillators; Capacitance-voltage characteristics; Curve fitting; Equations; Frequency synthesizers; Phase locked loops; Tuning; Varactors; Virtual colonoscopy; Voltage control; Voltage-controlled oscillators; Differential LC VCO; tuning curve; varactor;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics, 2007. ICM 2007. Internatonal Conference on

Conference_Location

Cairo

Print_ISBN

978-1-4244-1846-6

Electronic_ISBN

978-1-4244-1847-3

Type

conf

DOI

10.1109/ICM.2007.4497669

Filename

4497669