| 摘要 |
A variable capacitance displacement transducer is disclosed for developing an electrical signal having an amplitude precisely controlled by the position of a mechanical input element, which in turn varies the capacitance of the transducer. The transducer includes three spaced conductive places arranged in parallel relation. Electrical signals are applied to one of the outer plates. The other two plates are maintained at substantially the same signal level for minimizing the capacitance therebetween so that the center plate functions as a shield to control the capacitive coupling between the two outer plates. An amplifier including a negative feedback circuit is coupled to the other outer plate to develop output signals having amplitudes determined by relative position between the inner plate and the two outer plates.
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