Optimal timing for skew-tolerant high-speed domino logic

When low threshold voltage (V_t) is applied to domino logic to improve the performance, the tradeoff between performance and noise margin is a major design issue. To resolve the tradeoff we propose Skew-Tolerant High-Speed (STHS) domino logic, which incorporates a dual keeper structure and delay logic gates. Detailed timing analysis of STHS domino logic induces optimal timing conditions wherein contention-free skew-tolerant window is maximized. We show that dual keeper structure increases innate noise-tolerance, and clock delay control logic fortifies signal skew-tolerance. Simulation results show that STHS domino logic is more robust to noise and signal skew than High-Speed (HS) domino logic, while presenting better performance and power efficiency.