| 摘要 |
An inductive proximity sensor has an oscillatory circuit (L, C, Rp), an electric energy source (11) coupled to the oscillatory circuit for compensating losses in the circuit, and a filter (15) for compensating signal changes encountered in the oscillatory circuit. The input of the filter is coupled to the oscillatory circuit and its output is coupled and sending output signals to the energy source. The energy source changes the energy or current supplied to the oscillatory circuit as a function of the output signals from the filter to thereby actively compensate for signal changes encountered in the oscillatory circuit.
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