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Signal integrity enters Synopsys flow

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seeya

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By Michael Santarini, EE Times
Jun 2, 2003 (10:12 AM)
URL: h**p://www.eedesign.com/story/OEG20030602S0081

San Mateo, Calif. - At the 40th Design Automation Conference this week in Anaheim, Calif., Synopsys Inc. will demonstrate the most recent version of its register-transfer-level-to-GDSII integrated tool bundle, Galaxy, with new signal-integrity design and analysis capabilities woven into it.

Introduced in February as an "RTL-to-GDSII design platform," Galaxy is a collection of point tools from Synopsys and its 2002 acquisition, Avanti, and includes Design Compiler, JupiterXT, Floorplan Compiler, Physical Compiler, Astro, StarRCXT, Hercules and Proteus. They are tied together with the Milkyway database and PrimeTime SI static-timing analysis tool. All tools in the environment use common libraries and constraint files, and designers have optimized the links among the various point tools to work cohesively.

In Galaxy SI, Synopsys has added signal integrity to the flow.

"We've had signal-integrity static crosstalk analysis, combining timing and static crosstalk into one tool with PrimeTime SI, for over a year. Now we are extending signal-integrity support to the full flow-the implementation and sign-off environments," said Tom Ferry, vice president of marketing at Synopsys (Mountain View, Calif.). Galaxy SI eliminates the effects of crosstalk noise, crosstalk delay, IR drop and IR drop's effect on timing throughout the flow, he said.

To provide that support, Synopsys added signal-integrity technologies to the Astro place and route and the Physical Compiler physical synthesis tools, added noise analysis to PrimeTime SI and resolved PrimeTime SI run-time problems. Designers had criticized PrimeTime SI v. 2003.03's run-times in a recent Synopsys Users Group (SNUG) survey on www.deepchip.com.

"The last version of PrimeTime SI took care of crosstalk's effect on delay, and now it can do glitch analysis," Ferry said. The company engineered a more consistent form of SI analysis by merging the Avanti tools with Synopsys tools, he said.

Run-times have also improved with the most recent release, Ferry said. "With PrimeTime SI, and with other tools for that matter, we focus on accuracy first and run-time performance second," he said.

Synopsys has also added a "placement-based" prevention feature to Physical Compiler Expert that prevents the placement technology from introducing crosstalk problems, Ferry said.
 

No as good as syn0psys says.

Maybe you should think the c@dence and magm@ tool. I think these two

are better about SI. :)
 

PT _SI results are OK as compared to celtic of cadence.
 

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