Theory of spin torque nano-oscillator-based phase-locked loop

Mitrofanov, Alexander; Сафин, А. Р.; Udalov, N. N.; Kapranov, M.V.

doi:10.1063/1.5004117

Cited by 19 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In [2] considers the case of synchronization of several oscillators in order to reduce PhN. In [3,4] the synchronization scheme of two nanoscale spintronic oscillators was investigated, for which the possibility of PhN reduction in the phase synchronization mode was also demonstrated. Therefore, the mechanism of phase and amplitude noise transformation during synchronization of auto oscillations is of considerable interest from the fundamental point of view for oscillators of different physical nature.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Characteristics of a Biharmonic Oscillator with Two Synchronous Modes

et al. 2022

View full text Add to dashboard Cite

The paper investigates the influence of the coupling coefficient of the double-loop filter forming a biharmonic oscillator on the quality factor and resonant impedance of the input impedance at the resonant frequencies of the double-loop filter. The resonant frequencies of the filter are exactly multiples of 2. In this paper show numerical results that simplify the choice of filter parameters to provide conditions for selfexcitation of two oscillations at exactly multiples of frequencies. Two synchronous modes allow to create a generator with compensation for fluctuations in the reactive component of the output impedance of the active element, which increase the phase noise of the oscillator.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of the Characteristics of a Biharmonic Oscillator with Two Synchronous Modes

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In order to substantially improve the phase and frequency stability, a standard means is the integration of the oscillator into a phase locked loop (PLL) system, which on a circuit level continuously corrects the oscillator's phase fluctuations through comparison with an external reference. This approach applied to STNOs recently gained attention in theory 24,25 as well as in terms of practical realizations 3,4,[26][27][28][29][30] . It represents an important step towards STNO applicability and system integration.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of phase noise in spin torque nano oscillators by a phase locked loop

Wittrock¹,

Kreissig²,

Lacoste³

et al. 2021

Preprint

View full text Add to dashboard Cite

The main limitation in order to exploit spin torque nano-oscillators (STNOs) in various potential applications is their large phase noise. In this work, we demonstrate its efficient reduction by a highly reconfigurable, compact, specifically on-chip designed PLL based on custom integrated circuits. First, we thoroughly study the parameter space of the PLL+STNO system experimentally. Second, we present a theory which describes the locking of a STNO to an external signal in a general sense. In our developed theory, we do not restrict ourselves to the case of a perfect phase locking but also consider phase slips and the corresponding low offset frequency 1/f 2 noise, so far the main drawback in such systems. Combining experiment and theory allows us to reveal complex parameter dependences of the system's phase noise. The results provide an important step for the optimization of noise properties and thus leverage the exploitation of STNOs in prospective real applications.

show abstract

“…From this viewpoint, phase systems become attractive for ANS construction since they are able to ensure the necessary stability in a wide locking range. One more reason for using the phase locking loops (PLL) in constructing ANS is the possibility of nanoscale implementation (e g., on the basis of spintronics [3,4] and magnonics [5]) of separate loop components, such as phase detector, controllable oscillator and filter, as well as the possibility of spatial scaling [6]. Hereinafter we regard the " neuromorphic" dynamics as such a behavior of a dynamic system when it exhibits spike or bursting activity controllable by varying the system parameters [2].…”

mentioning

confidence: 99%

Controllable neuromorphic dynamics of the phase locked loop

L.A.

A.R.

2022

Technical Physics Letters

View full text Add to dashboard Cite

We consider the neuromorphic dynamics of a filter-free phase locked loop with a phase modulation of a reference oscillator. The transition from pulsed single-spike dynamics to the bursting dynamics can be easily controlled by changing the depth and frequency of phase modulation, as well as the gain factor along the ring of the phase locked loop. The possibility of implementing neuromorphic calculations of the "OR" type in the scheme of three phase locked loops mutually coupled through a common loop filter (control circuit) is shown. The presented results can be used in designing hardware-implementable neuromorphic networks with increased frequency stability, resistant to noise effects. Keywords: neuromorphic dynamics, phase locked loop, logical operations.

show abstract

Theory of spin torque nano-oscillator-based phase-locked loop

Cited by 19 publications

References 23 publications

Analysis of the Characteristics of a Biharmonic Oscillator with Two Synchronous Modes

Analysis of the Characteristics of a Biharmonic Oscillator with Two Synchronous Modes

Stabilization of phase noise in spin torque nano oscillators by a phase locked loop

Controllable neuromorphic dynamics of the phase locked loop

Contact Info

Product

Resources

About