COMPUTER AIDED DESIGN SYSTEM FOR PRINTED BOARD

摘要

PURPOSE: To omit the checking manhour and also to improve the designing quality by automatically calculating and checking the wiring pattern length for the signal line to which the transmitting speed of a flowing signal is prescribed. ;CONSTITUTION: An input part 12 inputs a logical connection data file 10 and a packing connection data file 11 and then transfers both data to a conversion part 13. The part 13 calculates the wiring pattern length that is decided for the prescribed transmitting speed (frequency) of a signal line and converts the prescribed frequency into the wiring pattern length. A processing part 14 compares the wiring pattern length that is calculated and converted by the part 13 with the actual wiring pattern length calculated by a pattern length calculation part 15 to decide the validity of the converted wiring pattern length. That is, a fact whether the signal wiring is carried out or not with the largest wiring pattern length or less is decided. This deciding result is outputted through an output part 16.;COPYRIGHT: (C)1994,JPO&Japio