Determining the oscillation of differential VCOs

Author

Buonomo, A. ; Schiavo, A. Lo

Author_Institution

Seconda Universiti degli Studi di Napoli, Roma, Italy

Volume

3

fYear

2003

fDate

25-28 May 2003

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1204976

Filename

1204976