| 摘要 |
A pseudorandom number generator ( 1 ) has a first linear feedback shift register ( 2 ), a second linear feedback shift register ( 3 ), an initial value generator ( 4 ), a polynomial coefficient generator ( 5 ), and a pseudorandom number output unit ( 6 ). The initial value generator ( 4 ) generates initial values and supplies the same to the first linear feedback shift register ( 2 ) and second linear feedback shift register ( 3 ). The polynomial coefficient generator ( 5 ) generates coefficients of a characteristic polynomial and supplies the same to the second linear feedback shift register ( 3 ). The pseudorandom number output unit ( 6 ) carries out exclusive-OR operations on bits sequentially provided by the first linear feedback shift register ( 2 ) and second linear feedback shift register ( 3 ), generates a pseudorandom number sequence, and outputs the same.
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