发明名称 |
Method and apparatus for reducing transition time for a magnetic head to switch from a write mode to a read mode by reducing a maximum current value at different rates |
摘要 |
A device for switching a read head from a write mode to a read mode includes a voltage ramp generating circuit, generating and outputting a voltage ramp after a write operation; a variable current source for discharging an initial current of the read head, wherein a current output by the current source is controlled proportionally to the slope between the beginning of the voltage ramp and a first threshold of the ramp, the current source having an initial maximum value higher than the initial current of the head; and an accentuating circuit for accentuating the ramp slope between the beginning of the ramp and a time when the current output by the variable current source becomes equal to the initial current present in the head.
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申请公布号 |
US5724201(A) |
申请公布日期 |
1998.03.03 |
申请号 |
US19950571760 |
申请日期 |
1995.12.13 |
申请人 |
SGS-THOMSON MICROELECTRONICS S.A. |
发明人 |
JAFFARD, JEAN-LUC;DESPREZ-LE GOARANT, YANN |
分类号 |
G11B5/02;G11B5/027;G11B5/09;G11B5/465;G11B15/087;G11B15/12;(IPC1-7):G11B15/12 |
主分类号 |
G11B5/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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