| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to generate more perfect random numbers that have no periodicity of 1/f characteristics based on the noises being generated from a noise source that has 1/f characteristics. SOLUTION: The noise generated from a diode that has the 1/f characteristics is amplified, and the differential of the noises outputted from the first noise generation circuit 31 and the second noise generation circuit 32 that eliminate the hum with high path filters is taken by a differential circuit 33 and the noise that has no periodicity is taken out, and '1' and '0' are generated through the comparison of a threshold level and binary numbers generated from digital signals obtained through the A/D conversion of the above noises. The threshold level is adjusted in order to make the appearance probability of these '1' and '0' closer to 0.5. Delimiting '1' and '0' that are obtained in above manner in each specified period generates random numbers. The period can be changed in accordance with the random numbers generated. |
