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A Novel Time Domain Noise Model for Voltage Controlled Oscillators

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DOI: 10.4236/cs.2013.41015    4,944 Downloads   7,509 Views  

ABSTRACT

This paper describes a novel time domain noise model for voltage controlled oscillators that accurately and efficiently predicts both tuning behavior and phase noise performance. The proposed method is based on device level flicker and thermal noise models that have been developed in Simulink and although the case study is a multiple feedback four delay cell architecture it could easily be extended to any similar topology. The strength of the approach is verified through comparison with post layout simulation results from a commercial simulator and measured results from a 120 nm fabricated prototype chip. Furthermore, the effect of control voltage flicker noise on oscillator output phase noise is also investigated as an example application of the model. Transient simulation based noise analysis has the strong advantage that noise performance of higher level systems such as phase locked loops can be easily determined over a realistic acquisition and locking process yielding more accurate and reliable results.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

L. Ke, P. Wilson and R. Wilcock, "A Novel Time Domain Noise Model for Voltage Controlled Oscillators," Circuits and Systems, Vol. 4 No. 1, 2013, pp. 97-105. doi: 10.4236/cs.2013.41015.

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