| 摘要 |
<p>A digital data transmitter comprising a transmission side (100) and a receiving side (200). The transmission side is provided with a binary-to-quaternary conversion section (110) for converting a data sequence, an encoding section (120) for encoding the converted data by mapping, a digital filter (130), a D/A conversion section (140), a low-pass filter (150) for attenuating noise due to aliasing distortion, a differential driver (160), low-pass filters (170a, 170b) for eliminating noise from the differential-output signal, a common mode choke coil (180) for eliminating common-mode noise and outputting the signal into a twisted paired cable. The receiving side (200) is provided with a low-pass filter (210) for eliminating the noise from the signals passing through the twisted paired cable, a receiver (220), an A/D conversion section (230), a digital filter (240), a judging section (250) for judging the signal level of the received signal, a decoding section (260) for decoding the signal level to received data, and a synchronizing section (270) for generating a clock.</p> |
