| 摘要 |
PURPOSE:To make inductance of an exciting coil at the time of writing small and to make induced voltage in the case of reading large by providing two exciting coils in a mangetic head and making connection to a writing circuit and connection to a reading circuit different from each other. CONSTITUTION:In the writing circuit, the first coil 4 is connected to terminals 10, 7 and a terminal 6 is connected to short-circuit to a terminal 10. In the reading circuit, a circuit in which the first coil 4 and the second coil 5 are connected in series through a terminal 9 is connected between terminals 8, 7. Thus, the number of turns of the two exciting coils is made different from each other, and the rise time and fall time of current can be shortened in the case of writing, and sufficiently the large induced current can be obtained in the case of reading. |
