| 摘要 |
PROBLEM TO BE SOLVED: To attain multiplexing/demultiplexing conversion with a simple circuit configuration without special sequence control even if a transmission rate of a high transmission rate channel and a low transmission rate channel is an optical value. SOLUTION: The system is provided with a serial/parallel conversion shift register 4 that conducts serial/parallel conversion and with a control shift register 1 controlled to shift contents of the shift register 4 in synchronism with the serial/parallel conversion shift register 4, and the serial/parallel conversion shift register 4 outputs demultiplexed data, based on timing of data outputted from the control shift register 1.
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