发明名称 |
Adjustable bandwidth differentiating amplifier for a magnetic disk drive |
摘要 |
A variable bandwidth differentiating amplifier comprises a differential amplifier and a variable filter comprising a capacitor and a pair of diodes. A current source, having a current value derived from the track postion information in the track count register of a disk drive forward biases the diodes to alter the frequency response of the filter. A Gilbert multiplier may also be included to maintain a constant voltage gain for the differential amplifier.
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申请公布号 |
US5157559(A) |
申请公布日期 |
1992.10.20 |
申请号 |
US19910742055 |
申请日期 |
1991.08.06 |
申请人 |
VTC INC. |
发明人 |
GLEASON, JEFFEREY A.;SUTLIFF, DAVID E. |
分类号 |
G11B5/035;H03H11/12 |
主分类号 |
G11B5/035 |
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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