have any tool can read GDS database (JPG file ) to netlist

read gds

as I know , chipsmith can read graphic like JPG/GIF file and convert to
spice netlist ..


by the way , have any tool can convert GDS2 to spice netlist ,
if I only know some layer is n_well , poly , oxide ..
no technology file , and extract draft spice netlist ..

gds to jpg

A lot of tools can convert GDS2 to spice netlist. These tools are known as LPE tools. Some of them are Calibre, Dracula, ...

how to extract a net from gds

You can use a free tool like Microwind....you can import your gds and extract spice netlist without any problem (if your layout corespond with tech file of the program...and this program have almost tech file for all process ....i think he have and 0.09um )

convert gds file to hspice

Sergiu_Q said:

You can use a free tool like Microwind....you can import your gds and extract spice netlist without any problem (if your layout corespond with tech file of the program...and this program have almost tech file for all process ....i think he have and 0.09um )

Click to expand...

Have you try to use Microwind for a realy design ? I dont think it will be able to deal with a realy databse of some Mb ....

For what I know, it is a good tool to learn microelectronics, but not to do real work.

Bastos

gds gif convert

If you dont care the parasite element , LVS tool is enough . LVS extract the layout to the netlist for device & connection info 1st then compare it to the source netlist .

gdsii to spice

but I problem is , I am not sure which GDS number is poly or oxide ..
(no technology file )
so , I can guess some layer is poly , some is oxide , some is N_well
..
and tool can convert GDS to lpe like netlist ..

convert gdsii to jpeg

I think L-edit can do this work.

database jpg

andy2000a said:

but I problem is , I am not sure which GDS number is poly or oxide ..
(no technology file )
so , I can guess some layer is poly , some is oxide , some is N_well
..
and tool can convert GDS to lpe like netlist ..

Click to expand...

Open (or import) the GDSII in a layout editor. Then you may guess which layer is poly; which is metal; and which are others. Anyway, recognizing a layer from GDSII is much easier than from chip photos -- one must recognizing layers from photos in reversing projects.

converting gds to spice netlist

Yes - import it to layout viewer and then figure out what is what -it should be very very easy.
But you will have to create some sort of extraction rule deck to create netlist - I do not believe there is any tool which could generate netlist from something using nothing.
Extraction deck could be very simle but you have to have one - try to reuse one from other designs.
In case you know what technology it was you can go to a) other designs and reuse the technology files or b) go to mosis and try to get some of the generic PDKs

Anyway the netlist will not be very readable (each gate "finger" = 1 MOS etc) so I do not believe you will be able recreate the circuit easily. Reverse engineering from layout could be way faster.