Patent attributes
A data receiving device includes a reference clock signal transmitted through a differential conductor pair, estimating attenuation characteristics in the differential conductor pair serving as a transmission path of the reference clock signal, and compensating a transmission path attenuation of an NRZ signal based on the estimated attenuation characteristics. Because the reference clock repeats a transition between 0 and 1 at the same period as NRZ data period without fail, it is possible to estimate high frequency attenuation characteristics of a conductor by observing the amplitude of the reference clock at the receiving end. Characteristic control of a compensation filter is performed with respect to the NRZ signal to reproduce a proper transmission signal from a signal waveform that has been deteriorated by the attenuation caused in a long-distance transmission of high-speed digital data using the differential cable.
