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L-Edit

Introduction to L-Edit and Tanner Tools

What is L-Edit?
L-Edit is the primary software program in the Tanner Tools package. While S-Edit is the Schematic Editor, L-Edit is the Layout Editor. L-Edit allows us to design the physical layout of an integrated circuit (IC). The program can generate files that can be sent to a manufacturer for actually making the chip.
What else is there to Tanner Tools?
1) L-Edit: Layout Editor. 
2) S-Edit: Schematic Editor. 
3) W-Edit: Waveform Editor. 
4) T-Spice: Tanner's Spice Program / Circuit Simulator. 
5) LVS: Layout vs. Schematic. 
6) GateSim: Gate-level Timing Simulator. 
7) NetTran: Netlist Translator, which allows the user to translate OrCad and Tango netlist files to SPICE files and L-Edit files.
How do I approach the IC design process using L-Edit?
1) Export-Place and Route-Extract: One can draw a schematic in S-Edit, export it to a .tpr file, place and route the .tpr file in L-Edit, and extract the SPICE parameters from the layout to a .spc file for simulation in T-Spice and plotting in W-Edit. 
2) Layout-[Design Rules]-Extract : One can draw the layout directly in L-Edit, check to see if the layout follows all prescribed design rules, and extract the SPICE parameters from the layout to a .spc file for simulation in T-Spice and plotting in W-Edit. 
 
Note: The Design Rule Check is optional when merely practicing layout, but rather essential if the integrated circuit is to be physically manufactured.