发明公开
- 专利标题： Demagnetization of thin film magnetic recording transducers utilizing a decreasing AC current
- 专利标题（中）： 使用减少交流电流的薄膜磁记录传感器的去磁
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申请号： EP89110672.6申请日： 1989-06-13
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公开(公告)号： EP0357889A3公开(公告)日： 1992-03-18
- 发明人: Gailbreath, Samuel H. , Simmons, Ralph F.
- 申请人： Hewlett-Packard Company
- 申请人地址： Mail Stop 20 B-O, 3000 Hanover Street Palo Alto, California 94304 US
- 专利权人： Hewlett-Packard Company
- 当前专利权人： Hewlett-Packard Company
- 当前专利权人地址： Mail Stop 20 B-O, 3000 Hanover Street Palo Alto, California 94304 US
- 代理机构： Liesegang, Roland, Dr.-Ing.
- 优先权： US267144 19880909
- 主分类号： G11B5/465
- IPC分类号： G11B5/465 ; G11B19/04
摘要：
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.
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