Cybereda delivers on the technology challenge of having dramatically faster SPICE simulation without compromising accuracy. They are various ways to improve the speed of circuit simulation but can involve compromises that engineers are not aware of.
Dangers of Fast-SPICE
Cybereda technologists have extensive experience in analog circuit simulations. They understand the compromises that Fast-SPICE simulators use to cheat on accuracy and provide faster answers. Unfortunately, designers have to struggle with whether they are getting “more wrong answers per second.”
Fast-SPICE compromises:
Accuracy Problems of Commercial SPICE
Many designers are surprised that commercial SPICE simulators that have been in use since the 1980s still have accuracy issues. Because commercial SPICE is now under required to simulate faster because of circuit complexity, short-cuts are taken to speed analysis at the expense of accuracy. Cybereda technologists see analysis problems for even simple circuits.
The following netlist produces incorrect simulation results in a popular commercial SPICE.
m1 2 1 1 1 nr l=0.4u w=2.5u
c1 2 0 1.e-15
v1 1 0 pwl(0 0, 0.1n 2.97, 1.1n 2.97)
.model nr nmos level=54
.tran 1p 5n
.option post delmax=1p
.end
This circuit was simulated with PCSIM (green trace) and commercial SPICE (red trace). At 3nsec into the simulation, the incorrect commercial SPICE result diverges by 50mv from the correct charging curve for the load capacitor.
PCSIM CyberParallel™ Technology
The PCSIM engine takes advantage of CyberParallel technology to accelerate circuit matrix calculations across multiple CPUs.
Features of CyberParallel technology
