发明授权
- 专利标题： Magnetic sensor circuit for detecting and monitoring a magnetic field
- 专利标题（中）： 用于检测和监测磁场的磁传感器电路
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申请号： US12594894申请日： 2008-07-10
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公开(公告)号： US08274281B2公开(公告)日： 2012-09-25
- 发明人: Masakazu Sugiura
- 申请人： Masakazu Sugiura
- 申请人地址： JP Chiba
- 专利权人： Seiko Instruments Inc.
- 当前专利权人： Seiko Instruments Inc.
- 当前专利权人地址： JP Chiba
- 代理机构： Brinks Hofer Gilson & Lione
- 优先权： JP2007-193084 20070725
- 国际申请： PCT/JP2008/062522 WO 20080710
- 国际公布： WO2009/014013 WO 20090129
- 主分类号： G01R33/06
- IPC分类号： G01R33/06
摘要：
A magnetic sensor circuit includes a Hall element, first and second switching circuits, an amplifier, a threshold voltage source, a comparator that can function as a voltage follower circuit, and a reference voltage source. The circuit elements are arranged such that an offset of the magnetic sensor circuit can be eliminated to detect a weak magnetic field with high precision. In operation, the reference voltage source charges an input capacitor of the comparator to a predetermined voltage.
公开/授权文献
- US20100117640A1 MAGNETIC SENSOR CIRCUIT 公开/授权日：2010-05-13
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