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Could someone post the benchmark between Ultrasim, Hsim or Nanosim ? Compared with silicon result, which tool is better in terms of accuracy and speed ??
HSIM is the best in terms of accuracy (use analog mode 3); Ultrasim is probably silmilar to Nanosim. My opinion, up to now, HSIM is the best transistor level simulator to simulate the design which HSPICE has the difficulty.
I wonder if someone has more information about the others competitors of HSIM such as Synopsys/nanosim, Cadence/ultrasim and Evercad/ADiT.
As far as I know, Nassda is the only vendor that shows lots of data on their website (**broken link removed** and **broken link removed**) comparing memory usage and simulation time for many different classes of circuits. I understand that is marketing oriented data but at least we can have an idea of what kind of circuit the tool can handle.
Does someone know where we can find similar information for the others tools?
tao_168,
Ultrasim supports all the modes of HSIM, including digital, MS, analog and spice. It also supports spectre and hspice syntax.
The best thing about ultrasim is that it also handles structural verilog and ahdl.
There is another newer Product called amsUltra(ultrasim & amsDesigner(-spectre) which will be introduced this year.
Labo
Yes. They are pretty much the same "class" of simulator. These new family of simulators are generally called fast Spice simulators because they are much faster than the second generation Spice-like tools such as HSPICE and SPECTRE. Besides, they can also handle much bigger circuits. In 2nd gen. simulators the memory usage grows very quickly with the number of transistors.
Take a look at the link in my previous post and you will find good information about the difference between these types of simulators.
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