Interactive symmetry verification in Virtuoso with Calibre or automated symmetry verification in Virtuoso using Calibre - ams OSRAM

In this session, AMS-Osram engineers demonstrate how they use Calibre RealTime to perform interactive symmetry verification directly within the Cadence Virtuoso layout environment—streamlining analog layout validation without requiring traditional batch-mode flows.

Symmetry is essential in analog and mixed-signal IC design, where layout imbalances can lead to electrical mismatches and silicon validation issues. The Calibre RealTime solution enables users to verify symmetry in real time on any visible layout layer, without GDS stream-out, connectivity setup, or LVS requirements.

This flexible, lightweight approach allows engineers to:

• Run symmetry checks on-demand, directly in their layout view

• Catch subtle mismatches that are difficult to detect visually

• Minimize setup and avoid tool licensing constraints

• Use standard DRC rule decks in an interactive workflow

AMS-Osram highlights several real-world use cases where this method caught symmetry violations early in the design process, improving layout quality and reducing time-to-signoff. The team also shares feedback on usability improvements in the latest Calibre release, including enhancements to symmetry axis detection.

By enabling rapid, localized verification, Calibre RealTime allows layout engineers to independently validate symmetry throughout the design flow—saving time, reducing risk, and enhancing productivity.