1-1-1 MASH ΔΣ time-to-digital converters with 6 ps resolution and third-order noise-shaping

Ying Cao, Wouter De Cock, Michiel Steyaert, Paul Leroux

    Research outputpeer-review


    Two 1-1-1 MASH ΔΣ time-to-digital converters (TDCs) are presented in this paper. Third-order time domain noise-shaping has been adopted by the TDCs to achieve better than 6 ps resolution. Following a detailed analysis of the noise generation and propagation in the MASH ΔΣ structure, the first prototyping TDC has been realized in 0.13μm CMOS technology. It achieves an ENOB of 11 bits and consumes 1.7 mW from a 1.2 V supply. In the second MASH TDC, a delay-line assisted calibration technique is introduced to mitigate the phase skew caused by the large comparator delay, which is the main limiting factor of the MASH TDC's resolution. The demonstrated TDC achieves an ENOB of 13 bits and a wide input range of 100 ns. This TDC shows a temperature coefficient of 176 ppm° C within a temperature range of -20 to 120° C. It consumes only 0.7 mW and occupies 0.08 mm 2 area (core).

    Original languageEnglish
    Article number6222342
    Pages (from-to)2093-2106
    Number of pages14
    JournalIEEE Journal of Solid-State Circuits
    Issue number9
    StatePublished - 2012

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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