Open AccessSmall area 0.3 pJ/conv, 45 ps time‐to‐digital converter for arrays of silicon photomultiplier interfaces in 150 nm CMOS
Author(s) -
Perenzoni M.,
Xu H.,
Stoppa D.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.2761
Subject(s) - ring oscillator , silicon photomultiplier , cmos , time to digital converter , power consumption , figure of merit , materials science , silicon , optoelectronics , power (physics) , computer science , physics , electronic engineering , electrical engineering , optics , detector , engineering , jitter , scintillator , quantum mechanics , clock signal
A ring‐oscillator‐based time‐to‐digital converter (TDC) is presented which can achieve a figure‐of‐merit of 0.3 pJ/conv in a very small footprint of 0.0024 mm 2 . Thanks to the optimisation of the ring‐oscillator and of the sub‐cycle interpolation, a 45‐ps LSB is obtained with only 0.95 mW of power consumption. The area and power characteristics make the TDC suitable for its use in repeated instances, such as in multiple silicon photomultipliers readout channels or single‐photon imaging devices with time‐correlated detection.