Spatially oversampled TDC with digital resolution enhancement

作者: Kameswaran Vengattaramane , Jonathan Borremans , Michiel Steyaert , Jan Craninckx

DOI: 10.1007/S10470-011-9669-7

关键词:

摘要: A digital resolution enhancement technique for time-to-digital converters (TDC) is proposed. This involves a simultaneous multi-channel measurement of time interval with low complexity TDC varying resolutions. The coarse outputs each converter are digitally post-processed to obtain an output whose precision much better than that the individual converters. Three post-processing algorithms proposed and their limitations in presence non-idealities analyzed. prototype system 8 channels implemented 90 nm CMOS. 40MS/s channel algorithmically combined over 2.2---3X measured improvement 4/6/8 modes, validating principle. chip occupies 0.3 mm2 draws up maximum 4 mA from 1.2 V supply.

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