Patent ID: 9425997
Filing Date: 2016-08-23
CPC Classification: H01J,H01L,H04L

Claim Text:
1. A method for obtaining a pre-cursor intersymbol interference (ISI) coefficient, the method comprising: sampling a signal with reference to a data-level voltage to recover sampled bit patterns, the signal exhibiting post-cursor ISI and pre-cursor ISI; while measuring an error rate of a first of the bit patterns, adjusting the data-level voltage to achieve a first error-rate value and recording the adjusted data-level voltage as a first data-level voltage; while measuring an error rate of a second of the bit patterns, adjusting the data-level voltage to achieve a second error-rate value and recording the adjusted data-level voltage as a second data-level voltage; and calculating the pre-cursor ISI coefficient using the first data-level voltage and the second data-level voltage.