# how to design a power amplifier's layout in l-edit?

i want to design a power amplifier in Tanner L-Edit.

I want to write code in the .ext file but I don't know what syntax or language the .ext file is expecting. Is it spice? I couldn't find a good tutorial.

The second option is to use the Dev-Gen tool but it produced this error:

Device = Mosfet
Channe = N
Single Transistor Length = 1.00
Single Transistor Width = 22.00
Transistor Multiple Count = 22
Bulk Pattern = 0
Gate Finger Pattern = 0
Source/Drain Finger Pattern = 0
Generated by: Dev-Gen ver. 14.11


If I check the SPICE paramter back annotation as in this screenshot:

All I get is the error (when I choose the .ext file Generic_025.ext)

Extract definition file is not selected.
Please click Browse EXT File button to select the file.

-
We prefer error messages to be in text format. That way, they're easier to read, and can be indexed by Google and by our search tools. I transcribed the text in your first image, but that doesn't look like an error message to me. Did you intend to write something different? – Kevin Vermeer Dec 9 '11 at 14:21
ok , thanks, no that is the error i get. and i assume that where the problem is. – 0x90 Dec 9 '11 at 14:31