Abstract: A design system provides data structures to store parameters of physical structures that can be viewed and modified through a graphical design interface. Certain of the structures of the physical system may be partitioned into a subsystem such that the data describing the subsystem includes physical topology data defining relative locations of the structures in the physical system. The physical topology data is back-annotated into a logical topology, such as in accordance with a predefined logical topology template. The logical data abstraction of the circuit design is kept synchronized with the physical data and presented in a logical topology that is kept legible through the prudent selection of logical topologies representing the physical subsystem design.

Abstract: A design system provides data structures to store parameters of physical structures that can be viewed and modified in a front-end process through a logical design interface. In this way, system behavior defined by component structure can be evaluated and modified through a schematic representation of the data, regardless of a state of data representing the physical layout of interconnected physical structures. In electric circuit applications, for example, high frequency circuits can be incrementally designed and evaluated through structural parameters defined in a schematic diagram data abstraction without modifying and evaluating a layout data abstraction of the circuit directly.

Abstract: Views for signals and instances are provided in a table based design entry system. The signal view allows a designer to enter signals to be used in a design. The signals may be individually entered or imported from pre-defined or external packages of signals. The instance view allows the designer to enter components and to define connectivity of pins of the components to signals. The components may be entered individually or imported from predefined or external packages. An naming routines provides signal name generation and copying names of other components (e.g., pin names) to name the signals. Data entered into the table based entry system is checked for errors (duplicate names, syntax, etc.), and exported to other design tools for processes such as simulation, layout, etc.