Dual-Rail Logic Synthesis for Semiconductor Timing and Area Tradeoffs

The patent applies parameter changes by utilizing dual-rail modules (PCHB and WCHB) with different operational characteristics. The Pre-Charged Half Buffer (PCHB) module optimizes for speed with pre-charged nodes, while the Weak Conditioned Half Buffer (WCHB) module optimizes for area efficiency. The logic synthesis process dynamically selects between these modules based on timing constraints and area requirements, changing the implementation parameters to resolve the contradiction between speed and area cost.

The patent applies segmentation by dividing the logic synthesis process into technology-independent optimization and technology-dependent optimization stages. This segmentation allows separate handling of different design concerns: the first stage focuses on logical optimization independent of manufacturing constraints, while the second stage addresses technology-specific implementation details including manufacturing precision requirements. This segmented approach enables miniaturization for lower power consumption while systematically managing the increased manufacturing precision requirements.

The patent applies preliminary action by performing technology-independent logic optimization before technology-dependent optimization. This preliminary optimization stage prepares the logic netlist with optimized structures and identifies key performance parameters in advance, reducing the complexity of subsequent technology-specific optimization. By doing the heavy logical optimization work first, the EDA process becomes more efficient in the manufacturing stage while maintaining comprehensive design optimization capability through the two-stage approach.