| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital equalization device which efficiently equalizes the waveform of a signal which is large in amplitude difference, by using a digital equalizer without enlarging the scale of a circuit. SOLUTION: A digital equalization apparatus is provided with an analog LPF 4 for removing a high-frequency component from an input analog signal, a non-linear A/D converter 1 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 1. The non-linear A/D converter non-linearly A/D converts the analog signal so that, on the basis of a center value of amplitude of the analog signal, resolution per 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. COPYRIGHT: (C)2009,JPO&INPIT
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