Wide tuning range quadrature VCO using coupled multivibrators

Author

Filanovsky, Igor M. ; Oliveira, Luis B. ; Fernandes, Jorge R.

Author_Institution

Univ. of Alberta, Edmonton, AB, Canada

fYear

2009

fDate

25-27 June 2009

Firstpage

341

Lastpage

344

Abstract

Two multivibrators are coupled to produce a quadrature current-/voltage controlled oscillator with wide frequency tuning range (which can be wider than one decade). The tuning range, the achievable frequency of oscillation and the synchronization transients are investigated by simulations. The influences of mismatches of timing capacitors and charging currents on synchronization are also investigated. The results of simulations confirm the potential of the proposed VCO for RF applications.

Keywords

VHF oscillators; capacitors; multivibrators; synchronisation; timing circuits; voltage-controlled oscillators; VCO; charging currents; frequency tuning; multivibrators; oscillation frequency; quadrature current controlled oscillator; quadrature voltage controlled oscillator; synchronization transients; timing capacitors; CMOS technology; Capacitors; Circuit optimization; Coupling circuits; Diodes; Frequency synchronization; Timing; Tuning; Voltage; Voltage-controlled oscillators; Emitter-coupled multivibrators; quadrature VCO oscillators; wide tuning range;

fLanguage

English

Publisher

ieee

Conference_Titel

Mixed Design of Integrated Circuits & Systems, 2009. MIXDES '09. MIXDES-16th International Conference

Conference_Location

Lodz

Print_ISBN

978-1-4244-4798-5

Electronic_ISBN

978-83-928756-1-1

Type

conf

Filename

5289645