These instruments go beyond simple drawing of connections and devices. Usually they are integrated into the whole IC design flow and also connected to additional EDA tools for verification and simulation of the circuit under design.
A schematic, or schematic diagram, is a representation of the components of a system using abstract, graphic symbols rather than realistic pictures. A schematic usually omits all details which are not pertinent to the advice that the cheque is meant to convey, and might add unrealistic elements that aid comprehension. As an instance, a subway map intended for passengers might signify a subway station using a scatter; the scatter doesn't resemble the true station at all but gives the viewer information without any unnecessary visual clutter. A schematic diagram of a compound procedure utilizes symbols to represent the valves, ducts, valvesand pumps, and other elements of the machine, emphasizing their interconnection controlling and paths physical information. In a digital circuit diagram, the design of the symbols may not resemble the design in the circuit. In the design diagram, the emblematic components are organized to be easily interpreted by the viewer.
In electric power systems layout, a design drawing called a one-line diagram is frequently utilised to symbolize substations, distribution systems or even entire electrical power grids. All these diagrams simplify and compress the exact details that would be replicated on each individual stage of a three-phase method, revealing only one component instead of three. Electrical diagrams for switchgear frequently have common apparatus functions designate by standard function amounts.
Schematic diagrams have been used widely in repair guides to help users understand the interconnections of parts, and to give graphical instruction to help out with rebuilding and simplifying mechanical assemblies. Lots of motorcycle and automotive repair manuals devote a significant number of webpages into schematic diagrams.
In electronic design automation, until the 1980s schematics were practically the only formal representation for circuits. More recently, with the advancement of computer technologies, other representations have been introduced and specialized computer languages were developed, because using all the explosive development of the complexity of digital circuits, traditional schematics are becoming less practical. As an instance, hardware description languages are crucial for modern digital circuit design.
A semi-schematic diagram unites a number of the abstraction of a just schematic diagram along with different components exhibited as realistically as possible, for a variety of reasons. It's a compromise between a purely subjective diagram (e.g. the design of the Washington Metro) and an exclusively pragmatic representation (e.g. the corresponding aerial perspective of Washington).
In electrical and electronic industry, a schematic diagram is frequently utilized to refer to the design of gear. Schematic diagrams are usually used for the maintenance and repair of electronic and electromechanical systems.  Initial schematics have been done by hand, with standardized templates or off-the-shelf glue symbols, however today electronic design automation software (EDA or"electric CAD") is often used.