Driver device of magnetic heads for magnetic record and reproduction
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorYasuo Mitsuhashi
Life of this patent
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Abstract
A driver device for magnetic heads for a magnetic recording and reproduction apparatus. The driver device drives at least one combined head including at least two head members, each head member having a winding coil, and the effective gap width of the combined head is changed by selectively short-circuiting at least one of the winding coils. By switching a connection between the combined head and a record amplifier or a reproduction head amplifier, the effective gap width of the combined head is changed either to a narrow effective gap width for n time speed recording or reproducing or to a wide effective gap width for standard speed recording or reproducing.
Claims6
A driver device of a recording/reproducing apparatus for at least one magnetic combined head mounted on a peripheral surface of a rotary drum, the combined head having an effective gap width, plural head members and at least two winding coils for enabling the plural head members for recording and reproducing, the driver device comprising:
- switch means, connected to the winding coils, for changing the effective gap width by selectively short-circuiting at least one of the winding coils, the effective gap width of the combined head having a first effective gap width for recording and reproducing in an n time speed mode when said switch means is closed and a second effective gap width for recording and reproducing in a standard speed mode when said switch means is open, n being an integer greater than 1;
- and
- controller means, operatively coupled to said switch means, for closing said switch means during n time speed mode recording and reproducing and for opening said switch means during standard speed mode recording and reproducing.
A driver device of a recording/reproducing apparatus for driving at least two magnetic combined heads mounted on a peripheral surface of a rotary drum, each combined head having an effective gap width, plural head members and at least two winding coils for enabling the plural head members for recording and reproducing, the driver device comprising:
- at least two switch means, each being connected to the winding coils of a respective one of the combined heads, for changing the effective gap width of the respective combined head by selectively short-circuiting at least one of the winding coils of the respective combined head, the effective gap width of the respective combined head having a first effective gap width for recording and reproducing in an n time speed mode when a respective switch means is closed and a second effective gap width for recording and reproducing in a standard speed mode when the respective switch means is open, n being an integer greater than 1;
- and
- controller means, operatively coupled to said at least two switch means, for closing said at least two switch means during n time speed mode recording and reproducing and for opening said at least two switch means during standard speed mode recording and reproducing.
A method of driving a magnetic head mounted upon a rotary drums of a recording/reproducing apparatus, the magnetic head having plural head members, each of the plural head members having a respective head gap and a winding coil wrapped thereon for enabling the respective head gap for recording and reproducing, the plural head members being bonded together to form a composite head gap, the method comprising the steps of:
- enabling all of the respective winding coils of the plural head members of the magnetic head during recording and reproducing in a standard speed mode;
- and
- short-circuiting one of the respective winding coils of the plural head members of the magnetic head and enabling the remaining respective winding coils of the plural head members of the magnetic head during recording and reproducing in an n time speed mode, wherein n is an integer greater than 1.
Dependencies are inferred from the claim text.