Patent ID: 8467689

Claim:
A parallel-serial converter for optical transmission, comprising: a plurality of input terminals into which a plurality of binary signals are input in parallel, for converting the plurality of input binary signals to serial binary signals and transmitting the signals to an optical transmission module; and an input terminal for preventing bit continuation for inserting “1” signals or “0” signals into the serial binary signals so that the same value does not continue for a predetermined number of bits is assigned to the plurality of input terminals, wherein a first input terminal for preventing bit continuation for inserting “1” signals so that the value of “0” does not continue for a predetermined number of bits or a second input terminal for preventing bit continuation for inserting “0” signals so that the value of “1” does not continue for a predetermined number of bits is assigned as the input terminal for preventing bit continuation, wherein the first input terminal for preventing bit continuation and the second input terminal for preventing bit continuation are both assigned, and wherein the first input terminal for preventing bit continuation and the second input terminal for preventing bit continuation are assigned so as to be at equal interval from each other and so as to be alternate at the plurality of input terminals.