DEVICE FOR COMPENSATING SKEW BETWEEN CHANNELS

摘要

PURPOSE: A device for compensating a skew between channels is provided to prevent a change of a skew amount in a transmission channel from influencing other channels, and to reduce a delay amount in a skew compensating circuit, thus outputting data without any error by an error correction circuit even though frame synchronous circuits output wrong data by synchronous breakaway caused by a change of a skew amount. CONSTITUTION: N frame synchronous circuits(11-1-11-n) input parallel data obtained by transmitting the parallel data having more than 2 N bits in parallel, by using N transmission channels, and generate frame signals(SF) presenting a location of the parallel data on a time axis every transmission channel(ch1-chn). A reference timing decider(16) decides a reference timing according to the N frame signals outputted from the frame synchronous circuits(11-1-11-n). A skew amount detector(15) generates N skew mount signals(SS) according to the reference timing decided by the reference timing decider(16). Timing compensators(13-1-13-n) compensate a timing of the parallel data every transmission channel according to the N skew amount signals.