Quote:1. What is Turbo mode of spectre? what is the advantage in using that mode?
It adjusts/optimises the algorithms, and simulations (primarily for circuits with a reasonable number of devices) run faster, without compromising accuracy. It also has an improved "liberal" errpreset which is more accurate than standard non-turbo liberal (for transient).
Quote:2. What are the other modes of Spectre? When they are used?
There's also a parasitic reduction option.
Quote:3. Are there any other modes for any other tools?
Well, this is rather a vague question... however, AMS Designer also has access to the turbo mode (when using spectre as the solver) and Ultrasim will have a turbo mode from MMSIM71 (due shortly).
Regards,
Andrew.