To view DRC errors, the designer clicks on the error in Calibre RVE, which communicates through EVI to highlight the error in L-Edit. The errors display in sequence, and the designer resolves each one in turn in L-Edit, optionally re-running DRC.
The advantages of interoperability are even greater when cross-probing, especially during LVS. EVI supports both tools by requesting a given net in the layout or schematic and highlighting it in L-Edit and S-Edit. EVI can also query RVE for the location of particular devices in the layout or schematic by device name or from the cursor’s current position. Figure 3
shows net highlighting with different net layers in different colors.
Figure 3: Net highlighting with net layers in different colors
When tracking down shorts and opens on complicated nets in layout, EVI can highlight a net by marking only specified layers or by marking each layer of the net in a different color. Calibre RVE’s advanced short isolation function can minimize the short network to make the short easier to find.
Designers can also browse extracted parasitic results in Calibre RVE and L-Edit/S-Edit, sorting parasitic results by net name or by value to find those nets of greatest interest. EVI can highlight the resistance, capacitance to substrate, and coupling capacitance in the layout or schematic. This allows designers to pinpoint the specific layout geometry causing the largest parasitics, then modify the layout to minimize any parasitic effects.
About the author:
is the founder and CEO of EDA Solutions
After gaining a B.Sc. Hons. in Physics and Electronics at the University of Warwick, UK, Paul started his career in IC Design with Phillips Semiconductors (now NXP), eventually moving into product management. Paul then spent eight years in Design Consultancy and EDA Software sales management, first with Rood Technology, then later with Acapella. It was at Acapella Paul first gained experience with the Tanner tools and came to fully appreciate the benefits of MOSIS MPW services.
In 2001, Paul founded EDA Solutions to further the interests of both Tanner and MOSIS throughout Europe. In this time Tanner’s sales in Europe have increased almost 400 percent, with Tanner now a serious rival to the other leading analog design tool providers.