Abstract: Method and system for automatically checking a circuit layout of a PCB are disclosed. The method includes acquiring routing constraint information in an automatic table format, converting the routing constraint information from the automatic table format into a readable table format and generating routing constraint information in the readable table format, inputting the routing constraint information in the readable table format into a PCB layout software in a plug-in manner for the PCB layout software to acquire a corresponding circuit routing rule, acquiring, after routing ends, a data file outputted by the PCB layout software, and generating a check report by comparing and checking the data file and the routing constraint information. With the method, the constraint information is automatically inputted into the PCB layout software, and a check report is automatically generated for correcting errors on a circuit layout in the layout software, to improve circuit layout efficiency.

Abstract: A method for adjusting a line width and a line gap of a differential signal pair includes performing a new parameter setting step, a distance difference of center calculating step, a reference polygon generating step and a differential signal pair adjusting step. The new parameter setting step is performed to set a new line width and a new line gap of the new differential signal line pair. The distance difference of center calculating step is performed to calculate a difference between an original center distance of the original differential signal line pair and a new center distance of the new differential signal line pair. The reference polygon generating step is performed to generate a reference polygon from an original center line of the original differential signal line pair. The differential signal pair adjusting step is performed to adjust the reference polygon to the new differential signal line pair.

Abstract: A method for adjusting a line width and a line gap of a differential signal pair includes performing a new parameter setting step, a distance difference of center calculating step, a reference polygon generating step and a differential signal pair adjusting step. The new parameter setting step is performed to set a new line width and a new line gap of the new differential signal line pair. The distance difference of center calculating step is performed to calculate a difference between an original center distance of the original differential signal line pair and a new center distance of the new differential signal line pair. The reference polygon generating step is performed to generate a reference polygon from an original center line of the original differential signal line pair. The differential signal pair adjusting step is performed to adjust the reference polygon to the new differential signal line pair.