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A 5 Gb/s Link With Matched Source Synchronous and Common-Mode Clocking Techniques

A 5 Gb/s source-synchronous signaling system was developed utilizing a new clock/data skew minimization technique. The method incorporates a transmit clock delay line and integrating receiver yielding an increased tolerance to high frequency transmit source jitter. The system has the potential to su...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2011-04, Vol.46 (4), p.974-985
Main Authors: Zerbe, J, Daly, B, Lei Luo, Stonecypher, W, Dettloff, W, Eble, J C, Stone, T, Jihong Ren, Leibowitz, B, Bucher, M, Satarzadeh, P, Qi Lin, Yue Lu, Kollipara, R
Format: Article
Language:English
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Summary:A 5 Gb/s source-synchronous signaling system was developed utilizing a new clock/data skew minimization technique. The method incorporates a transmit clock delay line and integrating receiver yielding an increased tolerance to high frequency transmit source jitter. The system has the potential to support rapid turn-on without the clock buffer latency of conventional source-synchronous systems. A second method to minimize clock distribution delays with embedded clocking via superposition of clock in the common-mode across two differential pairs was also explored. A test device was fabricated in TSMC's 40 nm LP CMOS process and performance measurements indicate substantial margin improvements, even when the matched source-synchronous system is subjected to realistic source SJ and independent PSIJ noise. Comparable performance was also achieved with embedded common-mode clocking with matched peak swings, indicating it as a potential solution for pin-constrained designs.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2011.2108120