Title :
Determining the oscillation of differential VCOs
Author :
Buonomo, A. ; Schiavo, A. Lo
Author_Institution :
Seconda Universiti degli Studi di Napoli, Roma, Italy
Abstract :
A systematic nonlinear analysis of differential Voltage Controlled Oscillators (VCOs) is presented. A nonlinear perturbation model of these oscillators is developed using standard models for the devices, either bipolar or MOS, which include all regions of operation. Analytical expressions are then derived allowing the steady-state amplitude, the harmonic content, and the frequency deviation of the oscillator output waveform to be predicted either in steady-state or during the transient. The stability of oscillation is also established, thus thoroughly analyzing the dynamics of RF VCOs. An application of this analysis to a MOS VCO is also provided.
Keywords :
MOS analogue integrated circuits; circuit stability; radiofrequency integrated circuits; radiofrequency oscillators; voltage-controlled oscillators; MOS VCO; RF VCOs; differential VCOs; frequency deviation; harmonic content; nonlinear perturbation model; oscillator output waveform; stability of oscillation; standard models; steady-state amplitude; transient; Circuits; Frequency; Harmonic analysis; Local oscillators; Nonlinear equations; Performance analysis; Stability analysis; Standards development; Steady-state; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1204976
