发明名称 |
Write-to-read switching improvement for differential preamplifier circuits in hard disk drive systems |
摘要 |
The present invention relates to a preamplifier circuit comprising a plurality of amplifier stages coupled together and operable to consecutively amplify a signal associated with a head of a hard disk drive. The preamplifier circuit further comprises a power delivery circuit operably coupled to the amplifier stages and operable to provide power to the amplifier stages in a substantially concurrent manner when the hard disk drive is transitioning from a write state to a read state. In addition, the circuit comprises a control circuit operably coupled to the amplifier stages, and operable to activate at least two of the plurality of amplifier stages in a generally consecutive manner after the providing of power to the amplifier stages. In the above manner a saturation of an output of the preamplifier circuit is avoided by preventing substantially a propagation of glitches through the preamplifier circuit and providing for a substantially fast write-to-read transition time.
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申请公布号 |
US6621649(B1) |
申请公布日期 |
2003.09.16 |
申请号 |
US20000709699 |
申请日期 |
2000.11.10 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
JIANG HONG;RANMUTHU INDUMINI |
分类号 |
G11B5/09;G11B5/012;G11B5/596;G11B19/04;(IPC1-7):G11B5/02 |
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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