| 摘要 |
<p>PURPOSE:To suppress generation of a residual signal by slantingly changing recording signals in several steps at the time of rewriting to a control track. CONSTITUTION:The current which flows in a control head 23 is controlled by charges charged in a capacitor 18 when the state of current in the control head is changed to a second or third state. The second state is given by releasing a second transistor 21 from the base potential by a first switching means 10 to make the transistor in no operation. The third state is given by stopping supply of current from a constant current source 15 with a second switching means 12 and supplying the current from the first constant current source 15 by a third switching means 13 to make the transistor 20 in operation and to supply the current to the control head 23 through the first transistor 20 from the power source 25. By such a method, the recording signals at the time of rewriting on the control track is slantingly varied in several steps, and thereby, generation of residual signals can be suppressed.</p> |
