Rotary Traveling-Wave Oscillator With Differential Nonlinear Transmission Lines

Pontón, Mabel; Suárez, Almudena; Kenney, J.S.

doi:10.1109/tmtt.2014.2315778

Cited by 12 publications

(6 citation statements)

References 45 publications

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“…As expected, when particularizing 2 1 2 ( , ) Y V V to V 2 = 0 one obtains the incremental describing function G0 that enables the stability analysis of the periodic oscillation mode at 1  [see (8) ]. The steady-state doubly-autonomous quasi-periodic solutions are calculated by solving:…”

Section: A Calculation Of the Quasi-periodic Oscillation Modesmentioning

confidence: 84%

Oscillation Modes in Multiresonant Oscillator Circuits

Ramírez

Sancho

Suárez

2016

IEEE Trans. Microwave Theory Techn.

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An in-depth analysis of the oscillation modes in freerunning oscillators loaded with multi-resonance networks is presented. The analysis illustrates the mechanisms for the generation and stabilization of the various periodic modes and establishes the conditions for existence of a single stable periodic mode in distinct regions of the parameter plane. The mechanisms for the generation and stabilization of quasi-periodic regimes, with two concurrent oscillations, are also analyzed, considering different situations in terms of two relevant poles. The stability analysis of quasi-periodic solutions, derived in terms of admittance functions, can be applied to circuits simulated with harmonic balance, under the assumption of high quality factor resonators. The impact of the transistor biasing on the stability properties of the quasi-periodic regimes has been analyzed, demonstrating that it can be used to isolate the quasi-periodic solution from the periodic ones. The analysis procedures have been applied to a practical oscillator based on two cross-coupled transistors at the two frequencies 900 MHz and 2.5 GHz. The case of two independent oscillations operating in a synchronized regime is also analysed, as well as its impact on the phase-noise behavior.

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Section: A Calculation Of the Quasi-periodic Oscillation Modesmentioning

confidence: 84%

Oscillation Modes in Multiresonant Oscillator Circuits

Ramírez

Sancho

Suárez

2016

IEEE Trans. Microwave Theory Techn.

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“…The use of AGs enables an efficient frequency domain analysis of complex oscillator configurations, such as the recently proposed rotary travelling wave oscillator [24]. It is based on the use of Möbius-ring-like differential transmission line, with gain stages periodically distributed along the path [24][25], which allows obtaining multi-phase solutions with a quasi-square waveform. Fig.…”

Section: Harmonic Balancementioning

confidence: 99%

“…Phase values at consecutive nodes should be 2 /(2 ) m m N    , with m = 0 ... 2N-1. However, there is a possible coexistence of oscillation modes, due to the system symmetries [25]. Assuming identical amplitudes, the total admittance matrix exhibits repeated eigenvalues, associated with different phase distributions.…”

Section: Harmonic Balancementioning

confidence: 99%

“…This method can be combined with the use of auxiliary generators (AGs) to simulate the possible circuit self-oscillation and predict qualitative changes in the solution under the continuous variation of a parameter [18][19]. This contribution presents several examples of timely circuits which are demanding from a simulation point of view, including pulse injection-locked oscillators [22][23], rotary travelling wave oscillators (RTWO) [24][25] and unstable power amplifiers.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear microwave simulation techniques

Suárez

2015

2015 Integrated Nonlinear Microwave and Millimetre-Wave Circuits Workshop (INMMiC)

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-The design of high performance circuits with short manufacturing cycles and low cost demands reliable analysis tools, capable to accurately predict the circuit behaviour prior to manufacturing. In the case of nonlinear circuits, the user must be aware of the possible coexistence of different steady-state solutions for the same element values and the fact that steadystate methods, such as harmonic balance, may converge to unstable solutions that will not be observed experimentally. In this contribution, the main numerical iterative methods for nonlinear analysis, including time-domain integrations, shooting, harmonic balance and envelope transient, are briefly presented and compared. The steady-state methods must be complemented with a stability steady-state analysis to verify the physical existence of the solution. This stability analysis can also be combined with the use of auxiliary generators to simulate the circuit self-oscillation and predict qualitative changes in the solution under the continuous variation of a parameter. The methods will be applied to timely circuit examples that are demanding from the nonlinear analysis point of view.

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“…As one of the newest wave‐based oscillators, rotary traveling‐wave oscillator (RTWO) has gained recent interest due to some of its abilities: operating at high frequencies, sustaining a traveling wave with low phase noise, providing clock distribution with low skew and low jitter, and providing multiple‐phase signals . The property of providing multiple‐phase signals from different positions of the RTWO is useful for obtaining precise in‐phase and quadrature‐phase RF signals for I/Q modulation.…”

Section: Introductionmentioning

confidence: 99%

Thermal and flicker phase noise analysis in rotary traveling‐wave oscillator

Abbasalizadeh

Javadi

Naimi

2019

Circuit Theory & Apps

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Summary This paper analyzes the thermally induced phase noise and the up‐conversion of flicker noise into phase noise of rotary traveling‐wave oscillator (RTWO). Based on the analyses, this paper extracts the closed‐form formulas for the thermal and flicker phase noise of the RTWO. This paper compares the theoretical results with appropriate simulations to evaluate the accuracy of the derived closed‐form formulas. Comparisons confirm the accuracy of the extracted phase noise formulas. By using the presented straightforward approach along with accurate phase noise formulas, the designers can understand the RTWO's design tradeoffs. Also, they can design the RTWO for a specific phase noise without needing lengthy simulations.

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Rotary Traveling-Wave Oscillator With Differential Nonlinear Transmission Lines

Abstract: Abstract-

Cited by 12 publications

References 45 publications

Oscillation Modes in Multiresonant Oscillator Circuits

Oscillation Modes in Multiresonant Oscillator Circuits

Nonlinear microwave simulation techniques

Thermal and flicker phase noise analysis in rotary traveling‐wave oscillator

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