发明名称 |
MAGNETIC RECORDING/REPRODUCING DEVICE |
摘要 |
A helical scan magnetic recording/reproducing device having an MR reproducing magnetic head wherein data to be recorded on a magnetic tape is converted through a modulation circuit (42) into a DC-free code sequence. The device comprises a high-pass filter for attenuating the low frequency components of a reproduced signal picked up by an MR head (6), and a circuit (58) for demodulating the reproduced signal from the high-pass filter to produce data before being converted into th DC-free code sequence. The low band noise (thermal asperity) produced due to the contact of the magnetic tape with the MR head is removed and a noise-suppressed reproduction output can be obtained. A rotary transformer (25) mounted on a rotary drum is employed as the high-pass filter. <IMAGE> |
申请公布号 |
EP0944039(A4) |
申请公布日期 |
2006.03.29 |
申请号 |
EP19980947776 |
申请日期 |
1998.10.07 |
申请人 |
SONY CORPORATION |
发明人 |
OZUE, TADASHI;SHIRAI, TOSHIO;SAITO, TAKEHIKO;KAMATANI, YOSHITERU;IKEGAMI, TOMOHIRO |
分类号 |
G11B5/008;G11B5/02;G11B5/09;G11B5/53;G11B20/10;G11B23/00 |
主分类号 |
G11B5/008 |
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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