发明名称 |
Demagnetization of thin film magnetic recording transducers utilizing a decreasing AC current. |
摘要 |
<p>Noise in the readback signal of a magnetic recording device resulting from spurious pulses in the readback signal produced by transitions of the magnetic remanent state of the yoke in the read/write transducer is eliminated by controlling the occurrence of the spurious pulses. Immediately following the completion of the write process, a decreasing amplitude alternating current (58) is applied to the read/write coil (49) of the transducer to drive the yoke remanent state to a stable or zero remanent state prior to the commencement of the read process.</p> |
申请公布号 |
EP0357889(A2) |
申请公布日期 |
1990.03.14 |
申请号 |
EP19890110672 |
申请日期 |
1989.06.13 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
GAILBREATH, SAMUEL H.;SIMMONS, RALPH F. |
分类号 |
G11B5/127;G11B5/465;G11B15/12;G11B19/04 |
主分类号 |
G11B5/127 |
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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