Significant step in ultra-high stability quartz crystal oscillators

Salzenstein, Patrice; Kuna, Alexander; Sojdr, L.; Chauvin, Jacques

doi:10.1049/el.2010.1828

Cited by 38 publications

(40 citation statements)

References 7 publications

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“…It is obtained for a 20 s averaging integration time. This measurement result and its associated uncertainty are coherent with the best FFM floor previously measured [29]. We can notice that the oscillator aging hides the FFM floor for upper integration time.…”

Section: à14supporting

confidence: 89%

“…The performances have then been fully characterized with a Dual Mixer Time Difference Multiplication (DMTDM) based system described in the article and in some of the references [13,22]. In our case, we were able to measure the real performance of the distributed signals with a flicker frequency modulation (FFM) equal to 4.5 · 10 À14 at 12 s. We are certain that this is the real value, as this reference quartz was previously compared to the best quartz oscillator that was ever manufactured and presented in reference published in 2010 [29]. Additionally, fact that the noise floor better than the best performance ever measured on a quartz oscillator enable the use of such a DAS for future characterizations.…”

Section: Distribution Of the Signalmentioning

confidence: 94%

“…But the best frequency stability ever measured on a quartz crystal oscillator was then obtained in 2010. This new BVA oscillator has an estimated flicker frequency modulation (FFM) floor of 2.5 · 10 À14 at 5 MHz [29]. It was underlined that it leads to a significant step [30].…”

Section: à14mentioning

confidence: 99%

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Recent progress in the performances of ultrastable quartz resonators and oscillators

Salzenstein

2016

Int. J. Simul. Multisci. Des. Optim.

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-Stressed compensated (SC) cut led recently to the best frequency stability ever obtained with a quartz oscillator, 2.5 · 10 À14 for the flicker frequency modulation (FFM) floor. This result is confirmed in this paper with a 3.2 · 10 À14 ± 1.1 · 10 À14 . The quartz resonator is integrated in a 5 MHz enhanced aging box double oven controlled oscillator. After reminding a bit of history, this paper describes how the first significant development in terms of ultra-stable quartz state-of-the-art oscillators was performed in the last 20 years, how the resonators were chosen, and main information about the development of adequate electronics and how to mechanically and thermally stabilized such an ultra-stable oscillator. We also present how to characterize the expected performances, and hot topics in quartz based oscillators.

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Section: à14supporting

confidence: 89%

Section: Distribution Of the Signalmentioning

confidence: 94%

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Recent progress in the performances of ultrastable quartz resonators and oscillators

Salzenstein

2016

Int. J. Simul. Multisci. Des. Optim.

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“…This seemed to be the ultimate limit that one could obtain for a quartz based oscillator in the short-term stability domain since, no more tangible solution had been found to improve the phase noise of the resonator itself. Recently, better experimental results [3][4][5] have reintroduced hopes that quartz crystal oscillators may still have a progression margin in the short-term stability domain and refueled the discussion about what is the main factor limiting the stability between the phase flicker noise in the electronics and the intrinsic noise of the quartz crystal.…”

Section: Introductionmentioning

confidence: 99%

“…In formula (1), the volume V has been traditionally approximated by the volume between the electrodes [14], but then, the latest experimental results [5] seem to be below the prediction (considering  = 1 cm -3 ). In this paper, we show that a better estimation of the theoretical limit may be extracted from Handel's model, using the acoustic volume of the resonator, defined by the trapping of energy, instead of the volume between the electrodes.…”

Section: Introductionmentioning

confidence: 99%

Volume dependence in handel's model of quartz crystal resonator noise

Sthal¹,

Devel²,

Ghosh³

et al. 2013

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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-Though criticized by many, Handel's quantum model for 1/f noise remains the only model giving a quantitative estimation of the level of intrinsic 1/f noise in quartz crystal resonators, compatible with the best experimental results. In this paper, we reconsider the volume dependence in this model. We first argue that an acoustic volume, representing the volume in which the vibration energy is trapped, should be used instead of the geometrical volume between the electrodes. Then, we show that since there is an implicit dependence of the quality factor of the resonator with its thickness, the net effect of Handel's formula is not an increase of noise proportionally to the thickness of the resonator, as could be naively expected, but a net decrease when thickness increases. Finally, we show that a plot of Q 4 S y versus the acoustic volume, instead of the usual S y plot, could be useful to compare the quality of acoustic resonators having very different resonance frequencies.

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