In reverse PCB design technology, it refers to design of schematic diagram in anti PCB design process. In this process, schematic and layout files are generated from end product or based upon principle and operation of the PCB board. Further, this circuit design is based upon the functional characteristics of the product itself. In the forward design, in general, research and development on products is conducted to create schematic design, and then according to schematic, PCB is designed.
Whether it is being used in a reverse study and analysis of PCB principles and operating characteristics of the product, or be re-used in the forward design PCB design basis and foundation, PCB schematics have a special and important role. Well, according to diagram or physical file, how to push the anti-PCB schematics, reverse PCB design has important steps to use those facts.
A reasonable division of functional areas
In process of intact copper PCB circuit board reverse schematic design, the rational division of functional areas can help engineers reduce some design effort and improve the rendering efficiency. In general, a PCB board function will focus on the same components arranged to function zoning can have easy and accurate basis during reverse schematic design. You can simply define functional block of PCB and accordingly print board schematic can be designed.
It is important to note that division of the functional areas can not be done randomly. It requires electronics engineers to have knowledge and certain understanding. First of all, find a functional unit of the core element, then the connection can follow it to find other elements of the same functional unit according to the alignment, form a functional partition. Forming a functional zone is the basis of the principles of figure or schematic drawing. Additionally, in process of reverse design, do not forget to use component type on the circuit bord, they can help you faster functional partition.
Second is to find a reference number. The reference member can also be provided during the beginning of schematic design of the main components by means of custom circuit board network. After determining the reference member, pin numbers are mapped as per reference components and interfacing is done for higher accuracy of schematics. For printed wiring board engineers and designers, finding a reference member is not very complex matter. Under normal circumstances, a designer can choose components which play major role in the circuit as a reference member. They can be larger ICs with more pins, be easy to draw, such as integrated circuits, transformers, transistors, etc., these components can be easily used as a suitable reference member.
The reference member can also be provided during the beginning of schematic design of the main components by means of custom circuit board network. After determining the reference member, pin numbers are mapped as per reference components and interfacing is done for higher accuracy of schematics. For printed wiring board engineers and designers, finding a reference member is not very complex matter. Under normal circumstances, a designer can choose components which play major role in the circuit as a reference member. They can be larger ICs with more pins, be easy to draw, such as integrated circuits, transformers, transistors, etc., these components can be easily used as a suitable reference member.
Third is correct distinguish lines, drawing reasonable wirings and routing.
For distinction between ground, power lines, signal lines, engineers also need to have knowledge of the relevant power supply circuit design knowledge, printed circuits boards routing knowledge and so on. These lines of distinction can be analyzed from the component connection, the line width of the copper foil and electronic features and other aspects of the product itself.
In order to avoid overlap between different kind of wires and cross connection, ground can be interspersed by use of multiple ground symbols. Various lines can use different lines of different colors to ensure legible, there are a variety of components you can also use special signs. Even unit circuits each separately drawn, and finally combined to form final schematic.
Fourth, to grasp the basic framework and drawing on the same schematics
For some basic electronics circuits of small complexity, basic framework and circuitry can be drawn with basic composition. This ultimately forms overall framework of the schematic. The principle of drawing method for engineers to master basic composition of the circuit to get final framework. On the other hand, do not ignore the same type of electronic products that have a certain similarity in PCB circuit network architecture on the schematic, engineers can gain experience, to fully draw on the same circuit diagram to reverse design into new product schematics.
Fifth, check and optimization
Once the schematic design is completed, tested and checked, we will able to say it as end of reverse print circuit board schematic design. PCB nominal value of distributed parameter elements need to be sensitive to review and further optimization. According to quick turn printed circuit boards file diagram, schematic comparative analysis and verification, to ensure full consistency with the schematic diagram of the file. If it is found in review process that schematic layout is inconsistent with the request, it will be adjusted to the schematic until complete specifications are reasonable, accurate and clear.
