发明名称 |
Dual-sense impedance-matched reader |
摘要 |
A preamplifier system is connected through an interconnect to a read head. The preamplifier system includes a voltage-sense preamplifier having at least one input connected through the interconnect to the read head and having at least one output, and also includes a current-sense preamplifier having at least one input connected through the interconnect to the read head and having at least one output. A summing circuit is connected to combine the outputs of the voltage-sense preamplifier and the current-sense preamplifier. For optimal performance, the preamplifier system is impedance matched to the interconnect. The preamplifier system achieves excellent response due to impedance matching with acceptably low noise levels, since the correlated noise associated with the current-sense preamplifier is canceled at the summing circuit.
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申请公布号 |
US2002154431(A1) |
申请公布日期 |
2002.10.24 |
申请号 |
US20010797399 |
申请日期 |
2001.03.01 |
申请人 |
AGERE SYSTEMS GUARDIAN CORP. |
发明人 |
LEIGHTON JOHN D.;ELLIOTT CARL;COMEAU JONATHAN P. |
分类号 |
G11B5/012;G11B5/02;H03F3/45;(IPC1-7):G11B5/09 |
主分类号 |
G11B5/012 |
代理机构 |
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地址 |
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