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Nassda simulator gets analysis tools

Posted: 04 Mar 2004 ?? ?Print Version ?Bookmark and Share

Keywords:nassda? nanometer analysis platform? hsim v5.0? post-layout analysis tool? hsim?

Nassda Corp. has announced what it claims is a complete nanometer analysis platform with the release of HSIM v5.0, which adds five optional post-layout analysis tools to the company's HSIM circuit simulator. Nassda is also enhancing the simulator itself.

"We're trying to cover the post-layout challenges that designers are having at 130nm and below," said Graham Bell, senior director of marketing at Nassda. "So many nonlinear effects need to be accounted for in nanometer designs, and you need to do some kind of analysis."

One new option is a power network reliability analysis tool. It analyzes dynamic voltage drop and electromigration of power networks. The dynamic voltage drop analysis shows how timing and functional errors are caused by electrical-supply variations. Electromigration analysis for power nets shows how quickly metal lines deteriorate over time, because of the density of electrical-current flows.

A static power network resistance analyzer lets users electrically check the power network to determine correct construction, and eliminate gross errors. The option analyzes pad-to-pin and pad-to-internal power net resistances, and determines dc IR drop associated with the power network.

A signal net reliability option lets users check electromigration for signal nets. It analyzes buses where bidirectional signal operation occurs.

A signal integrity option provides reduction and hierarchical back-annotation of coupling capacitors from layout parasitic extraction. It also includes static-delay and cross-coupling checks that run before simulation, and dynamic checks that monitor coupling activity during simulation. Finally, a MOSFET reliability analyzer checks the degradation on circuit performance caused by hot-carrier injection on NMOS devices and negative-bias thermal instability on PMOS.

Enhancements to the HSIM simulator itself include Verilog-A compilation support, which lets users describe analog behavioral models. HSIM version 5.0 is also said to improve integration with Cadence Design Systems Inc.'s Analog Artist. A new electric field solver analyzes user-defined transmission lines with their frequency-dependent effects.

HSIM v5.0 will be available in April on Solaris, HP-UX, Windows and Linux OSs, starting at $85,000. Options start at $25,000.

- Richard Goering

EE Times

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