Dear all,

  I have a SRAM circuit (/circuits with different wordlengths from 8 to 48) which I need to simulate and do the power analysis. Initially I thought I could do the power analysis by simulating the circuit with Spectre. But my supervisor said that it could take many days to simulate one such circuit and I have to do these simulations on more than one circuit. So he suggested me to explore the possibilitys with nanosim. Is it fesible to do such a power analysis on spectre or else would you suggest me to use nanosim instead. How much time will it take to simulate a SRAM circuit with wordlenghts 8, 12, 16, 32 and 48. Your inputs will be very much apprecieted.

Thanks and Regards,
Kamesh.

Why don't you try the wordlength 8 circuit and see how it goes.  You might even try both Spectre and Nanosim for the small circuit and see if the accuracy of Nanosim (which Ken Kundert likes to call a "timing simulator" because it doesn't really have Spice accuracy) is good enough for you.

How many transistors are there?  For power analysis, it may be possible to analyze only one bit row with a multiplicity factor.  This could make a dramatic difference in the speed of the simulation.