发明名称 |
Read head preamplifier with thermal asperity transient control |
摘要 |
A preamplifier for correcting for thermal asperity transients in disk drives using magneto resistive read heads. The preamplifier has an input gain stage receiving a signal from the read head and an output buffer outputting a reader output to a read channel that is filtered of thermal asperity transients by a high pass filter positioned between the input gain stage and the output buffer. The high pass filter is voltage controlled based on an input control signal from a filter controller. The filter controller uses a low pass filter functioning as a peak detector to detect peaks in either the input or output voltage of the high pass filter. The low pass filter output is applied to a non-linear function generator generating the control signal for the high pass filter based on an increasing function of the absolute value of the low pass filter output. <IMAGE> |
申请公布号 |
EP1585130(A3) |
申请公布日期 |
2005.12.14 |
申请号 |
EP20050251685 |
申请日期 |
2005.03.18 |
申请人 |
STMICROELECTRONICS, INC. |
发明人 |
OZANOGLU, KEMAL;POSAT, BARIS;ALINI, ROBERTO |
分类号 |
G11B5/09;G11B5/00;G11B20/10;G11B20/22 |
主分类号 |
G11B5/09 |
代理机构 |
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地址 |
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