1.0 ps Resolution Time-to-Digital Converter Based-On Cascaded Time-Difference-Amplifier Utilizing Differential Logic Delay Cells

Tetsuya IIZUKA
Makoto IKEDA
Kunihiro ASADA

IEICE TRANSACTIONS on Electronics   Vol.E94-C    No.6    pp.1098-1104
Publication Date: 2011/06/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1098
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
time-to-digital converter,  TDC,  time-difference-amplifier,  TDA,  time amp,  

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This paper proposes a time-to-digital converter (TDC) utilizing the cascaded time difference amplifier (TDA) and shows measurement results with 0.18 µm CMOS. The proposed TDC operates in two modes, a wide input range mode and a fine time resolution mode. We employ a non-linearity calibration technique based on a lookup table. The wide input range mode shows 10.2 ps time resolution over 1.3 ns input range with DNL and INL of +0.8/-0.7LSB and +0.8/-0.4LSB, respectively. The fine time resolution mode shows 1.0 ps time resolution over 60 ps input range with DNL and INL of +0.9/-0.9LSB and +0.8/-1.0LSB, respectively.