发明授权
- 专利标题： Amplifier circuit for a hall-effect head
- 专利标题（中）： 用于大厅效果头的放大器电路
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申请号： US6912申请日： 1979-01-26
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公开(公告)号： US4218659A公开(公告)日： 1980-08-19
- 发明人: Takao Arai
- 申请人： Takao Arai
- 申请人地址： JPX
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX
- 优先权： JPX53-7256 19780127
- 主分类号： G11B5/02
- IPC分类号： G11B5/02 ; G11B5/37 ; H03F1/34 ; H03F3/183 ; H03F15/00
摘要：
A Hall-effect element is connected at one Hall current terminal to ground and at the other Hall current terminal to a DC voltage application circuit. Two Hall voltage terminals of the Hall-effect element are coupled with the base and the emitter of a first transistor, respectively. A second transistor is connected in series to the first transistor in such a way that the collector of the second transistor is fed back in current mode to the emitter of the first transistor.