after reading its brochure, i wonder it is able to extract the netlist from gds? it seems to be able to compare the netlist from gds w/ rtl code. i'm not sure if i'm right. besides, i prefer the one which is free, or shareware.
if you have a complete gds netlist, you stream in your gds into astro, define your layer numbers, and VDD/VSS. Then, you can write out a complete netlist. All this works if your gds was extracted completely to begin with.
I recommend to use the C@dence tools however it can extract R/C but not
the resistances of the routing wires. Does anybody has eperiences with
post extracting this resistances? Is it possible with the c@dence tools?
I recommend to use the C@dence tools however it can extract R/C but not
the resistances of the routing wires. Does anybody has eperiences with
post extracting this resistances? Is it possible with the c@dence tools?
As I known, the metal resistance is about 0.075 ohm/sq.
Compare to those equivalent resistance of MOS devices, it may omit.
However, the parasitic capacitance does not; loading will affect your transition time. This always happens on a submicron design...
In deep submicron, you may take care more parameters...
Currently, on 0.25um or above (>0.25um), C@dence Dracula seems has no extra options to done with a parasitic resistance. However, you may put an extra dummy metal layer to form a metal resistance if you want...
You can run LPE(in fact it is LVS) while you think from GDS netlist to SPICE netlist. But you should add some parameter in you .lpe file. i.e. cap, res etc.
In fact you are in a reverse flow .The RC extract tools can not work without an original netlist.
And from now on there haven't any tools can build a readable netlist from GDS file as I know.But if the GDS is not too huge ,you can try to use them ,and try to handle it.
I know two way.
1, Use LVS tools(like calibre), before check lvs, netlist from layout is extracted.
2, Use extract-rc tools(like xcalibre, diva), can extract-rc without RC, when use xcalibre, hspice and spectre netlist can be generated.