| 摘要 |
PURPOSE:To easily adjust a delay circuit by determining the number of delay circuits according to the number of magnetic heads. CONSTITUTION:In general, when there are (n) (n>=3) magnetic heads, the isolation angle between two magnets is twice as large as the isolation angle of the magnetic heads which is measured in the rotating direction of the mag netic heads and an angular time is only equalized to the time that a magnetic head requires to rotate by the isolation angle. Then, when the number (n) of magnetic heads is >=4, (n-3) angular time delay circuits having delay times to, 2to......(n-3)to are required.
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