Clock Mesh Skew Scheduling for Digital Circuit Timing

The patent applies local quality by implementing individual skew schedules for different clusters of end-points within the clock network. Each cluster receives customized skew adjustment based on its specific timing requirements, rather than applying a uniform clock distribution. This allows the system to maintain high clock rates while compensating for local variations in path length and loading effects.

The patent changes the timing parameters of the clock signal by introducing variable skew schedules that adjust the clock arrival time at different end-points. By dynamically modifying the clock signal parameters (arrival time, phase) across different regions of the circuit, the system can operate at higher frequencies while maintaining timing integrity despite variations in wire length and loading.

The patent segments the clock network into multiple clusters of end-points, each with its own skew schedule. This segmentation allows timing precision to be optimized for each cluster independently while using standardized skew control circuits. The segmentation approach reduces overall complexity by breaking down the large-scale skew management problem into smaller, manageable sub-problems that can be handled by identical circuit blocks.

The patent implements universal skew control circuits that can be applied to multiple clusters throughout the clock network. These multi-functional circuits perform the same skew adjustment function across different regions, reducing the need for custom-designed control logic for each cluster. The universal approach maintains timing precision while minimizing device complexity through reuse of proven circuit designs.

The patent segments end-points into clusters that share common skew schedules, representing a compromise between individual customization and manufacturing simplicity. By grouping end-points with similar timing requirements into clusters, the system achieves adequate timing accuracy without requiring unique skew control circuits for every single end-point, thereby simplifying the manufacturing process.

The patent implements partial customization by applying skew schedules at the cluster level rather than the individual end-point level. This partial action approach provides sufficient timing accuracy for most applications while significantly reducing manufacturing complexity compared to fully individualized skew control. The clustering strategy represents a practical compromise that achieves the necessary timing precision without excessive manufacturing burden.