发明名称 |
Preamplifier circuit and method for a disk drive device |
摘要 |
<p>An amplifying circuit and method are disclosed for amplifying electrical signals, such as electrical signals generated by the read head of a disk drive. The circuit includes a pair of cross-coupled differential amplifier circuits. Each differential amplifier circuit is asymmetric, including two input transistors of different transistor types. For instance, a first of the two input transistors of each differential amplifier circuit may be a bipolar transistor and a second of the two input transistors may be a field effect transistor. By utilizing asymmetric differential amplifier circuits, a relatively wider operating frequency range is obtained.
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申请公布号 |
EP1441341(A3) |
申请公布日期 |
2008.11.05 |
申请号 |
EP20040250285 |
申请日期 |
2004.01.20 |
申请人 |
STMICROELECTRONICS, INC. |
发明人 |
POSAT, BARIS;OZANOGLU, KEMAL;VENCA, ALESSANDRO |
分类号 |
G11B5/09;G11B20/10;G11B5/00;G11B5/012;G11B5/035;H03F1/42;H03F3/45 |
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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