| 摘要 |
<p>PURPOSE:To record data to a carrying body of magnetic metal, by magnetizing to S poles at timing information only and to N poles at recording of parity information. CONSTITUTION:In energizing S poles on the roof of a car, a current i1 flows by turning on a transistor (TR) 141b and turning off a TR141a and magnetization is made to the S poles. In the energizing to N poles, a current i2 flows by turning on the TR141a and turning off the TR141b inversely, and magnetization is made to N poles. Thus, composite information can be written in, by designating the energizing to the pole from a main control section.</p> |
