发明公开
- 专利标题： Differential microphone circuit
- 专利标题（中）： 差分麦克风电路
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申请号： EP10193886.8申请日： 2010-12-06
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公开(公告)号： EP2461605A1公开(公告)日： 2012-06-06
- 发明人: Poulsen, Jens Kristian
- 申请人： Research In Motion Limited
- 申请人地址： 295 Phillip Street Waterloo, ON N2L 3W8 CA
- 专利权人： Research In Motion Limited
- 当前专利权人： Research In Motion Limited
- 当前专利权人地址： 295 Phillip Street Waterloo, ON N2L 3W8 CA
- 代理机构： Moore, Barry
- 主分类号： H04R19/01
- IPC分类号： H04R19/01
摘要：
There is provided an electret microphone comprising a junction gate-field-effect transistor (JFET) and a bias resistor connected to the JFET and supplying current to the JFET, whereby an electrical output is determined by measuring a differential voltage across the bias resistor.
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