Humbucker pickup device for active and passive guitars
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United States of America Patent
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Jun 12, 2018
Issued Date -
N/A
app pub date -
Apr 19, 2017
filing date -
Oct 31, 2016
priority date (Note) -
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Abstract
A humbucker pickup device for active and passive guitars including a matched pair of elongated coil assemblies with two sets of ferromagnetic pole pieces also includes two elongated, transversely polarized permanent magnets positioned between and parallel to the coils. The magnets are beside each other with opposite poles facing each other. The magnets with two respective pole pieces under each string establish two narrow magnetic fields to interact with the string at two points and a weaker intermediate magnetic field between the said pole pieces. The humbucker device includes an improved differential amplifier built from two or three operational amplifiers. Alternatively, the device may include a steel plate between the magnets for further weakening the intermediate magnetic field. Both embodiments, with and without the plate, are described.
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