Optimization of the Synchronization Bandwidth of Rationally Synchronized Oscillators Based on Bifurcation Control

Fernández, M.; Hoeye, S. Ver; Vázquez, C.; Hotopan, George; Camblor-Diaz, Rene; Las-Heras, Fernando

doi:10.2528/pier11062007

Cited by 8 publications

(9 citation statements)

References 28 publications

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“…However, additional methods are required in order to improve the conversion gain of the circuit. In this work, the conversion gain will be enhanced through the application of a recently developed technique based on the independent control of the harmonic content of the autonomous signal and the working regime of the circuit [5][6][7].…”

Section: Conversion Gain Of the Hsommentioning

confidence: 99%

“…This phenomenon has been described as undesired in [24], since it causes noise amplification over some spectral bands. However, it has also been shown that, when is carefully controlled, this phenomenon can be exploited to strongly amplify a weak signal [5][6][7].…”

Section: Working Regime Close To a Hopf Bifurcation Pointmentioning

confidence: 99%

“…The use of a multi-harmonic load based on an arbitrarily width modulated transmission line [19] provides a precise control over the position of the pair of complex conjugate poles created after reaching the condition expressed by (2) [7]. Therefore, several operating points, associated with different values of amplification, can be achieved.…”

Section: Working Regime Close To a Hopf Bifurcation Pointmentioning

confidence: 99%

“…This technique combines the control of the harmonic content of the autonomous signal [3] with the careful selection of the HSOM operating regime, which will be established in the vicinity of a Hopf bifurcation point [5][6][7]. Thus, the high amplification effect associated with this working point will be used in order to improve the conversion gain of the HSOM.…”

Section: Introductionmentioning

confidence: 99%

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New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

Fernández

Hoeye²,

Vázquez³

et al. 2012

PIER

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Abstract-In this work, the linearity of a high gain Harmonic Self Oscillating Mixer (HSOM) is analyzed. In order to obtain high conversion gain, the working point of the HSOM is established close to a Hopf bifurcation point. The traditional figures of merit used to characterize the linearity of conventional mixers cannot be directly applied to characterize the behavior of autonomous circuits, because of the influence of the input RF signal power on the autonomous signal parameters. The 1 dB compression point and the third order distortion will be analyzed as a function of the harmonic content and maximum gain of the circuit. From the collected data, the optimum harmonic content and the maximum conversion gain of the HSOM can be selected, for a particular application, in order to minimize the output IF signal distortion.

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Section: Conversion Gain Of the Hsommentioning

confidence: 99%

Section: Working Regime Close To a Hopf Bifurcation Pointmentioning

confidence: 99%

Section: Working Regime Close To a Hopf Bifurcation Pointmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

Fernández

Hoeye²,

Vázquez³

et al. 2012

PIER

Self Cite

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“…The noise characterization of oscillators is essential for the system engineers, because the device final performance is inherently defined by it [5][6][7]. At the same time, oscillator design presents high difficulties [8][9][10], although works by Randall and Hock [11] and Jackson [12], or even later works as González-Posadas et al and Jiménez-Martín et al [13,14] have tried to shed light on the conditions for proper oscillator design. These three last works have tried to unify all linear design methods by giving a global perspective, and they have characterized all oscillators as a feedback system using the Return Relations (RR) [15] and the Normalized Determinant Function (NDF) [16].…”

Section: Introductionmentioning

confidence: 99%

Transpose Return Relation Method for Designing Low Noise Oscillators

Jiménez-Martín¹,

González-Posadas²,

Parra-Cerrada³

et al. 2012

PIER

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Abstract-In this paper, a new linear method for optimizing compact low noise oscillators for RF/MW applications will be presented. The first part of this paper makes an overview of Leeson's model. It is pointed out, and it is demonstrates that the phase noise is always the same inside the oscillator loop. It is presented a general phase noise optimization method for reference plane oscillators. The new method uses Transpose Return Relations (RR T ) as true loop gain functions for obtaining the optimum values of the elements of the oscillator, whatever scheme it has. With this method, oscillator topologies that have been designed and optimized using negative resistance, negative conductance or reflection coefficient methods, until now, can be studied like a loop gain method. Subsequently, the main disadvantage of Leeson's model is overcome, and now it is not only valid for loop gain methods, but it is valid for any oscillator topology. The last section of this paper lists the steps to be performed to use this method for proper noise optimization during the linear design process and before the final non-linear optimization. The power of the proposed RR T method is shown with its use for optimizing a common oscillator, which is later simulated using Harmonic Balance (HB) and manufactured. Then, the comparison of the linear, HB and measurements of the phase noise are compared.

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On the Design of Broadband Hybrid Amplifiers Using Non-Uniform Transmission Lines as Impedance Matching Networks

et al. 2019

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In this paper, an approach for the practical design of broadband amplifiers in hybrid technology is presented. It is based on the use of non-uniform transmission lines to implement impedance matching networks, which are synthesized exploiting the powerful optimization tools available in the most common computer-aided design software packages. The versatility of the proposed technique makes it suitable for the design of a wide variety of broadband amplifiers. Furthermore, it is easily implementable in most microwave simulators and allows a considerable design time reduction, since it can be applied in a systematic way and avoids the use of external tools. To validate the technique, it is applied to the design of a low noise amplifier using a single encapsulated transistor. A prototype was implemented, providing 10-dB flat gain from 1 to 12 GHz, noise figure under 2.5 dB, and acceptable input and output matching, which agrees with the simulation data.

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Optimization of the Synchronization Bandwidth of Rationally Synchronized Oscillators Based on Bifurcation Control

Cited by 8 publications

References 28 publications

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

Transpose Return Relation Method for Designing Low Noise Oscillators

On the Design of Broadband Hybrid Amplifiers Using Non-Uniform Transmission Lines as Impedance Matching Networks

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