Exploiting Stochastic Resonance to Enhance the Performance of Digital Bang-Bang PLLs

In this paper, the multifaceted behavior of bang-bang digital phase-locked loops is explored. It is proved that a stochastic resonance phenomenon occurs at the balance between the quantization and intrinsic noise of the digitally controlled oscillator, which resides into the loop. How this condition...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2013-10, Vol.60 (10), p.632-636
Main Authors: Marucci, Giovanni, Levantino, Salvatore, Maffezzoni, Paolo, Samori, Carlo
Format: Article
Language:English
Subjects:
All-digital phase-locked loop (ADPLL)
Clocks
Detectors
digital phase-locked loop
Jitter
limit cycle
Noise
Oscillators
Phase locked loops
phase noise
Quantization (signal)
spur
stochastic resonance (SR)
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Summary:In this paper, the multifaceted behavior of bang-bang digital phase-locked loops is explored. It is proved that a stochastic resonance phenomenon occurs at the balance between the quantization and intrinsic noise of the digitally controlled oscillator, which resides into the loop. How this condition maximizes the signal-to-noise performance is shown. The loop parameter value that yields stochastic resonance is provided in closed form.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2013.2273732