Superposition properties of the phase noise based on the LTV model

Hashemi, Seyed Amir Hossein; Ghafoorifard, Hassan; Abdipour, A.

doi:10.1007/s10470-012-9884-x

Cited by 1 publication

(2 citation statements)

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“…So, the superposition of the phase noise can be applied with acceptable accuracy [25]. Therefore, at large offset frequencies, we can use the mentioned extension method for the proposed model: we find the phase variance for each perturbation source at each node using (5) or (12) and add the phase variances together to find the final phase variance…”

Section: Extension Methods For Multi-perturbation Sourcesmentioning

confidence: 99%

“…One of the closed-form models for evaluating phase noise is the linear time variant (LTV) model [6] which gives insight of physical effect of the parameters of the circuit on the phase noise. Expressions for calculation of the impulse sensitivity function (ISF) [7][8][9], effects of higher order harmonics of the output on the phase noise [10], relations between phase and amplitude noises [11] and superposition of the excess phase [12] are some works carried out to improve the LTV model. In these works, phase noise due to the white noise has been calculated.…”

Section: Introductionmentioning

confidence: 99%

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Phase noise of electrical oscillators due to multi‐Lorentzian noise sources based on the LTV model

Hashemi

2017

IET Microwaves, Antennas & Propagation

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Using the general expression of the phase variance expressed by the linear time variant (LTV) phase noise model, phase variances due to multi‐Lorentzian and white noise sources of electrical oscillators have been extracted and phase noise expressions due to white and Flicker noises have been calculated. Despite the basic LTV model in which the expressed phase noise due to white noise is valid for offset frequencies larger than the −3 dB corner frequency of the output and it tends to infinity for small offset frequencies, in the proposed model, the extracted phase noises due to white and Flicker noises are valid for the entire spectrum and become limited for small offset frequencies. Comparison between the results of the proposed model by those of the harmonic balance technique shows the validity of the model. Also, the effects of the physical parameters of the oscillator circuit on the extracted phase noise can be observed in the expressions. The proposed model is applicable to calculate the phase noise of the oscillators with single perturbation source applied to the intended output node.

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Section: Extension Methods For Multi-perturbation Sourcesmentioning

confidence: 99%