发明名称 |
Variable frequency chevron in printed media reference pattern to improve servo demodulation |
摘要 |
Reference patterns in accordance with the present invention can include variable frequency chevrons incorporated into a reference pattern on a printed media surface to improve servo demodulation. In an embodiment, the reference pattern can include one or more servo wedges having a preamble including digital information at a first frequency relative to the head when the rotatable medium is rotated at a spin speed. The servo wedges further include at least one field having a first set of a plurality of phase-bursts forming a positive chevron angle relative to the preamble and a second set of a plurality of phase-bursts forming a negative chevron angle relative to the preamble, wherein a frequency of the at least one field relative to the head when the rotatable medium is rotated at the spin speed varies between a first end of the media surface and a second end.
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申请公布号 |
US7206148(B2) |
申请公布日期 |
2007.04.17 |
申请号 |
US20050081346 |
申请日期 |
2005.03.16 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
EHRLICH RICHARD M. |
分类号 |
G11B5/09;G11B5/55;G11B5/596;G11B21/02 |
主分类号 |
G11B5/09 |
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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