| 摘要 |
PROBLEM TO BE SOLVED: To reduce change of power consumption waveform to be generated, since the average number of charging path is different due to the combination of input signals and operation timing of gates of rear stages being different. SOLUTION: The logic circuit 1 includes a logic operation circuit 10 which outputs an output logic state to be generated based on the input signals X, Y and a random number signal r to an output line Z1; an output control part 20, which controls an output state of the output line Z1 according to a control signal en1, and in the case of an output invalid state for invalidating the output logic state of the logic operation circuit 10, intercepts a path which leads from the output line Z1 to a power supply line VDD, and charges the output line Z1 by a potential of the power supply line VDD; and an output stage circuit 30, which switches the state to a masked state for invalidating a state for outputting based on the output state of the output line Z1 according to a control signal en2. COPYRIGHT: (C)2011,JPO&INPIT |
