发明名称 |
Reproducing amplifier and magnetic recording and reproducing apparatus employing the reproducing amplifier |
摘要 |
In order to solve a problem that it takes a long time to shift from a write mode to a read mode when there is a cross talk of an output signal of a recording head to a reproducing amplifier side, there is provided a reproducing amplifier including an amplifier circuit portion having a differential pair of transistors is provided with a switching circuit comprised of switches connected with resistors, which supply a bias voltage to each base of the differential pair of transistors, respectively in parallel. The switching circuit turns on for a write mode period and for a fixed period after a change from the write mode to a read mode to decrease the input impedance of the reproducing amplifier for the periods.
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申请公布号 |
US2002176191(A1) |
申请公布日期 |
2002.11.28 |
申请号 |
US20020120114 |
申请日期 |
2002.04.10 |
申请人 |
SAKO MICHIYA;TOKUCHIDA KAZUE;NARUSAWA KEIJI |
发明人 |
SAKO MICHIYA;TOKUCHIDA KAZUE;NARUSAWA KEIJI |
分类号 |
G11B5/09;G11B5/00;G11B5/02;G11B5/39;(IPC1-7):G11B5/09 |
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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