Patent attributes
A digital equalization apparatus is provided with an analog low pass filter for removing a high-frequency component from an input analog signal, a non-linear analog to digital (A/D) converter for non-linearly sampling the analog signal to output a digital signal, and an equalizer 2 for waveform-equalizing the digital signal outputted from the non-linear A/D converter. The non-linear A/D converter non-linearly A/D converts the analog signal so that, with a center value of amplitude of the analog signal being a reference, resolution per least significant bit (LSB) becomes higher as an input center of the non-linear A/D converter is closer to the center value while the resolution per LSB becomes lower as the input center of the non-linear A/D converter is farther from the center value.
