Patent ID: 6987402
Filing Date: 2006-01-17
Classification: H03K

Abstract:
1. A reversible logic element comprising: three input lines {T, T′, S} from which a signal can be input; three output lines {T state control means for controlling two states (an A-state and a B-state); input information identification means for identifying which of the three input lines the signal is input from; state determination means for determining whether the reversible logic element is in the A-state or the B-state; and control means, wherein if said state determination means determines that said reversible logic element is in the A-state and the signal is input from the input line T, then said state determination means conveys information that said reversible logic element is in the A-state to said control means, said input information identification means conveys information that the signal is input from the input line T to said control means, and said control means controls said output means to output the signal to the output line T if said state determinations means determines that said reversible logic element is in the B-state and the signal is input from the input line T, then said state determination means conveys information that said reversible logic element is in the B-state to said control means, said input information identification means conveys the information that the signal is input from the input line T to said control means, and said control means controls said output means to output the signal to the output line T if said state determinations means determines that said reversible logic element is in the A-state and the signal is input from the input line S, then said state determination means conveys the information that said reversible logic element is in the A-state to said control means, said input information identification means conveys information that the signal is input from the input line S to said control means, and said control means controls said output means to output the signal to the output line S′ while keeping said reversible logic element in the A-state, if said state determinations means determines that said reversible logic element is in the B-state and the signal is input from the input line S, then said state determination means conveys the information that said reversible logic element is in the B-state to said control means, said input information identification means conveys the information that the signal is input from the input line S to said control means, and said control means controls said output means to output the signal to the output line T if said state determinations means determines that said reversible logic element is in the B-state and the signal is input from the input line T′, then said state determination means conveys the information that said reversible logic element is in the B-state to said control means, said input information identification means conveys information that the signal is input from the input line T′ to said control means, and said control means controls said output means to output the signal to the output line T