What is Annotation

By Bester PCBA

Last Updated: 2023-08-14

What is Annotation

Annotation is the process of synchronizing changes made in the PCB design back to the schematic design. It involves updating the schematic information to accurately reflect the modifications made in the PCB layout. This is achieved by assigning unique reference designators or labels to components in the PCB design, ensuring easy identification and referencing throughout the design process.

During the annotation process, changes made to the PCB design, such as component modifications or updates, are propagated back to the corresponding elements in the schematic design. This ensures that the schematic accurately reflects the changes made in the PCB design, specifically for references and pins of components.

To perform annotation, a back-annotation file is used, typically in the form of a CSV or TXT file. This file contains the necessary information to update the references and pins in the schematic design based on the changes made in the PCB design. It allows for the seamless transfer of annotation changes from the PCB design, even if it was created using different CAD systems, back to the schematics.

Frequently Asked Questions

What Is Annotation in PCB Design

PCB Annotation is a valuable tool in PCB design, especially for those who prefer working in the PCB Editor. It allows for the systematic assignment of designators based on their position on the board. Additionally, the Annotation Tool proves to be helpful in situations where it is not feasible to have both the Schematic and the PCB open simultaneously.

What Is a Schematic Annotation

Annotations are components that can be added to a schematic without affecting the circuit’s functionality. They serve as a means of providing extra information or clarifying the design for those using the schematic. The four main types of annotations include lines, shapes, images, and text.

What Is Annotation in Engineering Drawing

Annotation in engineering drawing refers to the process of attaching notes, labels, and other relevant information to the various elements of the design. This practice has been widely utilized in the field of engineering. Engineering drawings are essentially representations of geometric shapes, accompanied by annotations such as notes, labels, and dimensions.