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Introduction to L-Edit and Tanner Tools
What is L-Edit?
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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?
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1) L-Edit: Layout Editor.
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2) S-Edit: Schematic Editor.
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3) W-Edit: Waveform Editor.
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4) T-Spice: Tanner's Spice Program / Circuit Simulator.
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5) LVS: Layout vs. Schematic.
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6) GateSim: Gate-level Timing Simulator.
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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?
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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.
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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.
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Note: The Design Rule Check is optional when merely
practicing layout, but rather essential if the integrated circuit is to
be physically manufactured.
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