San Francisco--June 15, 1998--Analogy, Inc. (Beaverton, Ore.) announced an agreement with Model Technology, Inc. to provide a co-simulation interface that allows board and IC designers to use and benefit from true top-down design methodologies. The new Saber/Modelsim interface links Saber, an analog and mixed-signal simulator, with Model Technology's digital simulators, Modelsim VHDL and Modelsim Plus. This co-simulation tool can be invoked from design environments, and the simulation results are combined and time-aligned in Analogy's Saberscope for viewing, analysis and correlation of analog and digital data.
With the Saber/Modelsim co-simulation interface, designers have access to HDLs for both the analog and digital portions of a circuit. Analog models are written in MAST, Analogy's mixed-signal HDL, while the digital components can be modeled in VHDL using Modelsim VHDL, or in VHDL and Verilog using Modelsim Plus. These HDLs describe the entire circuit, allowing a designer to simulate and analyze from the behavioral level down to the primitive level.
Saber/Modelsim utilizes Analogy's patented Calaveras synchronization algorithm at the analog/digital boundary. With Calaveras, information between the analog and digital simulators is exchanged only when needed. Other synchronization methods force information exchange at each analog/digital timestep or backtrack to re-evaluate previous calculations.
The Saber/Modelsim interface means designers can perform advanced statistical analysis on their mixed-signal designs. The co-simulation interface also benefits from Analogy's Hypermodel technology. Saber/Modelsim automatically inserts special Hypermodel interfaces, selected from a library of over 3,500 models. These Hypermodels are inserted at the analog/digital boundary to facilitate the accurate simulation of analog characteristics of digital pins when connected to analog devices. The Hypermodels can also be characterized to work with custom digital models.
The Saber/Modelsim co-simulation interface is available immediately for the Unix platform, and can be invoked from design environments provided by Analogy, Mentor Graphics and Cadence Design Systems. The interface will be available for the Windows NT platform, including accessibility from the Viewlogic design environment (both Unix and NT platforms), by year-end 1998.
Model Technology Inc.
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