Title :
Large-signal analysis of CMOS - LC VCOs
Author :
Buonomo, Antonio ; Schiavo, Alessandro Lo
Author_Institution :
Dipt. di Ing. dell´´Inf., Seconda Univ. degli Studi di Napoli, Naples
Abstract :
A nonlinear perturbation model of a complementary LC-tuned voltage controlled oscillator is derived, which consists of two mutually-coupled second-order equations. The first-order approximate periodic solution of describing equations is found, obtaining closed-form expressions for both the amplitude and the harmonics of oscillation, as well as for the correction of the oscillation frequency due to the nonlinear effect of varactors. The accuracy of presented formulae was validated by circuit simulations.
Keywords :
CMOS integrated circuits; voltage-controlled oscillators; CMOS; LC VCO; complementary LC-tuned voltage controlled oscillator; nonlinear perturbation model; oscillation frequency; varactor; Circuit simulation; Closed-form solution; Frequency; MOS devices; Nonlinear equations; Semiconductor device modeling; Shape; Varactors; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529766
