Patent ID: 7308620
Filing Date: 2007-12-11
Classification: H04L

Abstract:
1. A method determining a worst-case signal pattern of a serial link system, the method including: providing a serial link system having a transmitter, a receiver and a channel between the transmitter and receiver such that data sent by the transmitter is received by the receiver through the channel, the channel including a plurality of connections including a victim and at least first and second aggressors, with the victim being disposed between the first and second aggressors, sending a data pattern having a plurality of bits from the transmitter to the receiver along the victim, with all bits, but the last bit sent, being cleared and last bit being set, measuring an amplitude of the last bit substantially at a center of the last bit to define an initial condition, setting the third from last bit, measuring an amplitude of the last bit to determine whether setting of the third to last bit caused the amplitude of the last bit to change relative to the initial condition, if the setting of the third to last bit decreased the amplitude of the last bit, maintaining the setting of the third to last bit, and if the setting of the third to last bit one of maintained and increased the amplitude of the last bit, clearing the third to last bit, sequentially setting each bit that occurs in time before the third to last bit starting with the fourth to last bit and the effects, of setting each bit, on the amplitude of the last bit is determined, selectively performing one of maintaining and clearing the setting of each sequentially set bit to one of maintain and decrease the amplitude of the last bit, thereby obtaining a victim data vector pattern.