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Design Exchange Format

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Design Exchange Format (DEF) is an open specification for representing physical layout of an integrated circuit in an ASCII format. It represents the netlist and circuit layout. DEF is used in conjunction with Library Exchange Format (LEF) to represent complete physical layout of an integrated circuit while it is being designed.

DEF was developed by Cadence Design Systems.

DEF usually generated by P&R tool and it used as an input of a post analysis tools - like extraction tools / power analysis tools etc.

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