Method of analyzing coupling effect between signal lines in an integrated circuit

摘要

Second signal lines are selected among neighboring signal lines near a first signal line, such that the second signal lines have valid coupling capacitances with respect to the first signal line. Test signal patterns of the first signal line and the second signal lines are selected among real signal patterns according to a function of the integrated circuit. At least one of a coupling noise and a coupling transition delay of the first signal line is calculated based on the test signal patterns.

主权项

1. A method of analyzing coupling effect between signal lines in an integrated circuit, comprising:
selecting second signal lines among neighboring signal lines near a first signal line, the second signal lines having valid coupling capacitances with respect to the first signal line; selecting test signal patterns of the first signal line and the second signal lines among real signal patterns according to a function of the integrated circuit; and calculating at least one of a coupling noise and a coupling transition delay of the first signal line based on the test signal patterns; wherein calculating the at least one of the coupling noise and the coupling transition delay of the first signal line comprises: when a signal level of the first signal line transitions from a first signal level to a second signal level through a plurality of intermediate signal levels between the first signal level and the second signal level, calculating first signal transition times for the signal level of the first signal line to reach the intermediate signal levels without considering the valid coupling capacitances of the second signal lines; calculating second signal transition times for the signal level of the first signal line to reach the intermediate signal levels by considering the valid coupling capacitances of the second signal lines; and calculating the coupling transition delay of the first signal line based on the first transition times and the second transition times.