| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a circuit for detecting temporarily fluctuating variation which in an integrated circuit. <P>SOLUTION: A detection circuit 100, an arithmetic circuit 101, and a variation/voltage conversion circuit 113 are provided in an integrated circuit. In the detection circuit 100, characteristic variation of the integrated circuit is detected as an oscillation frequency of an output signal of the detection circuit 100. In the arithmetic circuit 101, variation information detected for every time interval regulated by a timer 106 is stored in a register 111, statistical processing is performed by a statistic arithmetic circuit 112, and the temporarily fluctuating characteristic variation of the integrated circuit is detected. The variation/voltage conversion circuit 113 further converts the characteristic variation into voltage information corresponding to the detected characteristic variation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
