| 摘要 |
PROBLEM TO BE SOLVED: To realize duplication signal system and circuit which can reduce a circuit scale and a system switch execution time to a system switch signal. SOLUTION: A method that separates a 0 system from a 1 system and adds ACT/SBY information to the respective systems is not used, but an ACT system is separated from a SBY system and subsequently, the signal is allocated to the 0 system and the 1 system. The number of ACT addition circuits or SBY addition circuits can be reduced by separating a system for the ACT system from a system for the SBY system. As to the ACT/SBY exchange of each system, communication is taken just before transmitting the signals of the ACT system and the SBY system after performing ACT and SBY signal addition.
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