PROJECT TITLE :
ROA-Brick Topology for Low-Skew Rotary Resonant Clock Network Design
This paper presents a topology-based answer for a coffee-skew rotary oscillator array (ROA) clock distribution network style. An ROA-brick structure is proposed that limits the traveling wave oscillation to solely two uniform ring rotation directions in the ROA-brick: all the rings in clockwise (CW) direction or all the rings in counter CW direction. An ROA engineered from the ROA-bricks has the subsequent advantages: 1) just like the ROA-brick, solely two uniform ring rotation directions are feasible within the ROA; a pair of) the same phase tapping points of all the rings within the ROA are identifiable; and three) these same phase tapping points of the ROA are freelance from the 2 attainable rotation directions. It is mathematically proved that the ROA-brick is the only ROA structure, which can limit the ring rotation direction combos thus as to ensure the generation of same part clock signals. The proposed brick-primarily based ROA clock generation and distribution networks are designed for ISPD 10 clock benchmarks demonstrating the gigahertz operation with the low-skew clock generation and distributions through HSPICE.
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