Title :
Exploiting Stochastic Resonance to Enhance the Performance of Digital Bang-Bang PLLs
Author :
Marucci, Giovanni ; Levantino, Salvatore ; Maffezzoni, Paolo ; Samori, Carlo
Author_Institution :
Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy
Abstract :
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.
Keywords :
digital phase locked loops; jitter; limit cycles; oscillators; phase noise; resonance; stochastic processes; PLL; digital bang-bang phase-locked loops; digitally controlled oscillator; intrinsic noise; loop parameter value; multifaceted behavior; quantization; signal-to-noise performance; stochastic resonance phenomenon; Clocks; Detectors; Jitter; Noise; Oscillators; Phase locked loops; Quantization (signal); All-digital phase-locked loop (ADPLL); digital phase-locked loop; jitter; limit cycle; phase noise; spur; stochastic resonance (SR);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2013.2273732
