发明授权
- 专利标题: Pulsed coil drive circuit for a sampled inductive transducer
- 专利标题(中): 用于采样感应传感器的脉冲线圈驱动电路
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申请号: US11867908申请日: 2007-10-05
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公开(公告)号: US07880462B2公开(公告)日: 2011-02-01
- 发明人: Hans Ulrich Meyer
- 申请人: Hans Ulrich Meyer
- 申请人地址: HK Central
- 专利权人: Advanced Sensor Technology Limited
- 当前专利权人: Advanced Sensor Technology Limited
- 当前专利权人地址: HK Central
- 代理机构: Leydig, Voit & Mayer, Ltd.
- 主分类号: G01B7/14
- IPC分类号: G01B7/14
摘要:
A pulsed coil drive for a sampled inductive transducer has at least one drive coil connected in a series circuit with a capacitor having a first terminal connected to the negative terminal of a voltage source. The series circuit is normally open during the intervals between pulses. Sampling occurs once per pulse. Each pulse's sampling interval is preceded by a pre-sampling interval and followed by a post-sampling interval. The supply voltage that is applied across the series circuit during both the pre- and post-sampling intervals is applied by switching a first terminal of the coil's free terminal to the voltage source's positive terminal through a p-channel MOSFET. During the sampling interval, the series circuit is shorted by switching the coil's free terminal to the voltage source's negative terminal through an n-channel MOSFET.