Title :
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
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;
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
