Electronic proximity switch
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United States of America Patent
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Dec 2, 2003
Grant Date -
Jun 13, 2002
app pub date -
Mar 13, 2001
filing date -
Mar 16, 2000
priority date (Note) -
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Abstract
Electronic proximity switch with a member (1) generating an alternating electromagnetic field, which is excited by an oscillator (2), an influencing of the alternating field, induced by approach of a trigger, being evaluated by an electronic signal-evaluation stag (8), including an amplifier stage (5), for emission of an output signal. The signal to be evaluated, which is obtained by a member (3, 4) influenced by the electromagnetic field, is mixed with the oscillator frequency before its evaluation.
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