| 摘要 |
PROBLEM TO BE SOLVED: To provide a code conversion circuit having a configuration for carrying out the code conversion of a signal of an NRZ code to a signal of another NRZ code, and capable of conducting code conversion processing at a working speed corresponding to a transmission rate or a working speed not higher than it. SOLUTION: The code conversion circuit comprises a demultiplexing portion 1 for separating a data signal of an NRZ code into a plurality of parallel data signals, a converting circuit 2 for inputting the plurality of separated parallel data signals, and a multiplexer 3 for multiplexing a plurality of parallel output data signals. The code conversion circuit has a configuration comprising a first exclusive-or circuit 12 for determining an exclusive OR of one data signal in the plurality of parallel data signals and a data signal obtained by delaying the other data signal by 1 bit by a delay circuit 11, a logical multiply circuit 13 for determining a logical product of an output signal of the first exclusive-or circuit 12 and a clock signal of a transmission rate of the parallel data signal, a T flip-flop 14 for inputting the output signal, and a second exclusive-or circuit 15 for determining an exclusive OR of a data signal of an NRZ code of the output signal and the other data signal. COPYRIGHT: (C)2007,JPO&INPIT
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