Calibre RealTime On-Demand Calibre signoff verification Calibre RealTimeCalibre® RealTime enables on-demand Calibre signoff design rule checking (DRC) for custom and analog/mixed-signal design flows, improving both design speed and the quality of results by providing immediate feedback on design rule violations and recommended rule compliance. Providing the same automated check capabilities available to digital design checking, Calibre RealTime makes it easier for custom IC designers to produce high-quality, high-performance designs at all nodes within today's tight production schedules. The award-winning Calibre RealTime platform completely transforms the custom/analog layout-verification-simulation loop by bringing Calibre signoff verification into the design creation process.