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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.
In integrated circuit design, Library Exchange Format (LEF) is a specification for representing the physical layout of an integrated circuit in an ASCII format. It includes design rules and abstract information about the standard cells. [1] [2] LEF only has the basic information required at that level to serve the purpose of the concerned CAD ...
Cadence Design Systems, Inc. (stylized as cādence) [2] is an American multinational technology and computational software company. [3] Headquartered in San Jose, California, [2] Cadence was formed in 1988 through the merger of SDA Systems and ECAD. [3]
Spectre is a SPICE-class circuit simulator owned and distributed by the software company Cadence Design Systems. It provides the basic SPICE analyses and component models. It also supports the Verilog-A modeling language. Spectre comes in enhanced versions that also support RF simulation and mixed-signal simulation (AMS Designer).
In integrated circuit design, physical design is a step in the standard design cycle which follows after the circuit design.At this step, circuit representations of the components (devices and interconnects) of the design are converted into geometric representations of shapes which, when manufactured in the corresponding layers of materials, will ensure the required functioning of the components.
The world of electronic design automation (EDA) software for integrated circuit (IC) design is dominated by the three vendors Synopsys, Cadence Design Systems and Siemens EDA (Formerly Mentor Graphics, acquired in 2017 by Siemens) which have a revenue respectively of 4,2 billion US$, 3 billion US$ and 1,3 billion US$.
A circuit design language (CDL) is a kind of netlist, a description of an electronic circuit. [1] It is usually automatically generated from a circuit schematic. It is used for electronic circuit simulation and layout versus schematic (LVS) checks. It is similar to SPICE netlists, but with some extensions.
Comparison: The extracted layout netlist is then compared to the netlist taken from the circuit schematic. If the two netlists match, then the circuit passes the LVS check. At this point it is said to be "LVS clean." (Mathematically, the layout and schematic netlists are compared by performing a Graph isomorphism check to see if they are ...