| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small random number generation circuit that can generate a high quality random number at a high rate, and a semiconductor integrated circuit, an IC card and an information terminal device using the same. <P>SOLUTION: The random number generation circuit, which inputs a digital random number signal of a first generation rate to output a digital random number signal of a second generation rate twice as high as the first generation rate, comprises a continuous signal processing part for processing the digital random number signal so that both a high level and a low level are not repeated more than a given count, a high speed signal adopting part for adopting signal components corresponding to the second generation speed into the digital random number signal, and a smoothing processing part for controlling the appearance frequencies of the high level and low level in a data sequence of the digital random number signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
