Computing device and method for checking differential pair

A computing device for checking differential pairs of a printed circuit board (PCB) layout, comprising:

• a storage device;
• at least one processor;
• and
• a check system comprising computerized code in the form of one or more programs, which are stored in the storage device and executable by the at least one processor, the one or more programs comprising:
• a window control module operable to display a check window for users to input a via pitch range each via pitch between switching vias of each of differential pairs in the PCB layout should fall into and a via gap range each via gap between switching vias of each adjacent two of the differential pairs should fall into;
• a design standard obtaining module operable to receive the via pitch range and the via gap range input through the check window;
• a differential pair identifying module operable to identify differential pairs in the PCB layout according to an information file for the PCB layout;
• a via information obtaining module operable to obtain the radius and the coordinates of the centers of the switching vias of each of the differential pairs according to the information file for the PCB layout;
• a computing module operable to determine each via pitch between the switching vias of each of the differential pairs according to the coordinates of the centers of switching vias, and determine each via gap between the switching vias of each adjacent two of the differential pairs according to the radius and the coordinates of the centers of switching vias;
• a comparing module operable to determine that the switching vias of one of the differential pair does not satisfy design standards if the via pitch between the switching vias of the one of the differential pairs does not fall in the via pitch range, and determine that the switching vias of adjacent two of the differential pairs does not satisfy design standards if the via gap between the switching vias of the adjacent two of differential pairs does not fall in the via gap range;
• and
• a display control module operable to display information related to the switching vias that does not satisfy design standards on the check window.