Patent Document ID: 10044539
Application ID: 15358748
Patent Status: 1

Claim One:
1. A method comprising: receiving a signal stream modulated with pulse amplitude modulation (PAM) associated with a plurality of bit patterns; determining boundary voltages for the plurality of bit patterns, each of the boundary voltages being associated with one of the plurality of bit patterns, wherein determining the boundary voltages comprises, for a target bit pattern of the plurality of bit patterns: determining a first count associated with the target bit pattern in a first plurality of clock cycles based on a reference threshold voltage; varying the reference threshold voltage based on the target bit pattern; and determining a second count associated with the target bit pattern in the first plurality of clock cycles based on the varied reference threshold voltage, wherein the boundary voltage for the target bit pattern is based on the first and second counts; and calibrating, based on the boundary voltages, a threshold voltage for use in recognition of the plurality of bit patterns.