| 摘要 |
PROBLEM TO BE SOLVED: To provide a fair game by preventing a specific random number from occurring with high probability even if a game operation is made on the basis of a fixed vibration by a simple circuit structure. SOLUTION: A noise filter 301 outputs a delay signal b1 by removing a high-frequency component from a step signal generated in accordance with the game operation. A Schmidt trigger IC 302 generates a latch signal c1 to acquire a random number value of a random number generator 202 when the level of the delay signal b1 exceeds a prescribed threshold value. In a main control board 20, a delay signal transmission pattern 304 to transmit the delay signal b1 to the Schmidt trigger IC 302 is arranged in the proximity of a clock signal transmission pattern 305, and the delay signal b1 affected by a clock signal CK3 is supplied to the Schmidt trigger IC 302. COPYRIGHT: (C)2007,JPO&INPIT
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