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1. 发明授权

US07187513B2 Differential magneto-resistive head pre-amplifiers for single polarity power supply applications 有权
标题翻译：用于单极性电源应用的差分磁阻头前置放大器
公开(公告)号：US07187513B2
公开(公告)日：2007-03-06
申请号：US10172368
申请日：2002-06-14
申请人： Takehiko Umeyama , Robert B. Ross , Masashige Tada
发明人： Takehiko Umeyama , Robert B. Ross , Masashige Tada
IPC分类号： G11B5/03
CPC分类号： G11B5/02 , G11B5/012 , G11B2005/0016 , G11B2005/0018
摘要： Magneto-resistive (MR) head pre-amplifiers for single polarity power supply applications are presented. An exemplary pre-amplifier includes a bias network coupled to first and second input terminals of the pre-amplifier, the input terminals for receiving signals corresponding to variations in magnetic fields from an MR head. At least one gain stage having first and second input terminals and first and second output terminals for amplifying the received signals is included. A pair of coupling capacitors, each capacitor being connected between a respective input terminal of the pre-amplifier and a corresponding respective input terminal of the at least one gain stage, are further included in the pre-amplifier design. Finally, the exemplary pre-amplifier includes a pair of feedback capacitors, each capacitor being connected between respective input and output terminals of the at least one gain stage. The pre-amplifier is powered by a single polarity power supply.
摘要翻译：介绍了用于单极性电源应用的磁阻（MR）磁头前置放大器。示例性前置放大器包括耦合到前置放大器的第一和第二输入端的偏置网络，用于接收对应于来自MR磁头的磁场变化的信号的输入端。包括具有第一和第二输入端的至少一个增益级和用于放大接收信号的第一和第二输出端。在前置放大器设计中还包括一对耦合电容器，每个电容器连接在前置放大器的相应输入端子和至少一个增益级的对应的相应输入端子之间。最后，示例性前置放大器包括一对反馈电容器，每个电容器连接在至少一个增益级的相应的输入和输出端子之间。前置放大器由单极性电源供电。

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