Patent ID: 7787536

Claim:
An adaptive equalizer apparatus, suitable for converting a first signal into a third signal, the adaptive equalizer apparatus comprising: an equalizer unit, for receiving and equalizing the first signal, and outputting a second signal; a sampling unit, electrically connected to the equalizer unit, for receiving and over-sampling the second signal to obtain a plurality of sampling data, wherein the sampling unit further determines a logic status of the second signal according to the sampling data and outputs the third signal; and an eye-opening monitor unit, comprising a logic circuit for determining whether there are more than a particular number of consecutive sampling data having the same logic level in the sampling data and outputting the detecting signal accordingly, wherein the eye-opening monitor unit is electrically connected to the sampling unit and the equalizer unit, for processing the sampling data and outputting a detecting signal; wherein the detecting signal represents an adequacy of internal parameters of the equalizer unit, and the equalizer unit decides whether to change the internal parameters according to the detecting signal.