Low‐noise rf capacitance bridge transducer

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Low‐noise rf capacitance bridge transducer

机译：低噪声射频电容电桥传感器

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We have designed a low‐noise servo system to both damp the motion of a high Q pendulum as well as measure the ground noise that drives it. The servo is based on a high‐frequency low‐noise capacitance bridge which is used as a displacement transducer for sensing the position of the pendulum. The bridge itself is servoed to minimize the need to adjust its components because of slow mechanical thermal drifts. Used as a displacement transducer we have achieved a position sensitivity of 4×10-11 cm/√Hz.

机译：我们设计了一种低噪声伺服系统，既可以阻尼高Q摆的运动，又可以测量驱动它的地面噪声。伺服器基于高频低噪声电容电桥，该电桥用作位移传感器以检测摆的位置。由于缓慢的机械热漂移，桥本身被伺服以最小化调整其组件的需要。作为位移传感器，我们实现了4×10-11 cm /√Hz的位置灵敏度。

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《Review of Scientific Instruments》 |1982年第7期|P.1014-1019|共6页
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Low‐noise rf capacitance bridge transducer

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