Apparatus and method for performing self-calibration of receiver offset without shorting differential input terminals of receiver

Abstract

A method and apparatus for performing self-calibration of receiver offset without shorting differential input terminals of a receiver are provided. The self-calibration includes: inputting input signals carrying predetermined data patterns into a plurality of receivers; performing data eye width measurement on the input signals received by the plurality of receivers to obtain multiple first data eye widths and multiple second data eye widths respectively corresponding to first and second data bytes; performing first offset calibration to make the multiple first data eye widths converge to a first common data eye width; performing second offset calibration to make the multiple second data eye widths be equal to the multiple first data eye widths, respectively, and converge to the first common data eye width; and performing reference voltage calibration on a reference voltage to optimize the multiple first data eye widths and the multiple second data eye widths.