Circuit connection information generation through circuit analysis and component replacement

A circuit connection information generating device comprising:

• first read means for reading first associated circuit information associated with one of first circuit connection information and second circuit connection information, said first circuit connection information specifying elements and element connections provided from layout pattern data, said second circuit connection information specifying elements and element connections provided from a circuit drawing;
• second read means for reading second associated circuit information associated with the other of said first circuit connection information and said second circuit connection information;
• and
• circuit connection information generating means for adding element information containing parasitic elements and connection information thereof to said second circuit connection information to automatically generate third circuit connection information on the basis of said first associated circuit information and said second associated circuit information by detecting a correspondence between said first associated circuit information and said second associated circuit information, and replacing said first associated circuit information with corresponding second circuit information when the correspondence is detected.