Audio current pick-up device
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United States of America Patent
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Apr 23, 1991
Grant Date -
N/A
app pub date -
May 17, 1989
filing date -
May 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An audio current pick-up device for use with an electric wire 6 carrying an electric current containing audio information comprises a pair of substantially identical magnetic induction coil assemblies 26, 27 disposed in parallel to each other with an axial deviation and orthogonally to the wire, each coil means including a magnetic core in the form of rod 30, 38 and a pair of induction coils 32A, 32B, 39A, 39B wound in opposite directions on respective halves of its core rod. An output of either of the induction coils is phase-shifted by a preset amount and composited with an output of the other magnetic induction coil to form a sound pick-up signal from which a sound output signal is derived.
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