Patent ID: 8665933

Claim:
A data transmitting and receiving device communicating with a remote device through a channel therebetween, comprising: a de-emphasis generator generating a de-emphasis; an output unit coupled to the de-emphasis generator and transmitting an output signal to the remote device according to the de-emphasis; an input unit receiving an input signal from the remote device; an equalizer coupled to the input unit and generating an equalization according to the input signal; and a processing unit coupled to the de-emphasis generator and the equalizer and computing a channel attenuation of the channel according to the equalization, wherein the de-emphasis generator adjusts the de-emphasis according to the channel attenuation, wherein the de-emphasis generator adjusts the de-emphasis according to a proportional value, the de-emphasis is equal to the channel attenuation multiplied by the proportional value, and the proportional value is greater than 0 and less than or equal to 1.