High fidelity audio cable
OwnerKha D. Nguyeninventor
Life of this patent
Estimating the term…
Abstract
A cable for the transmission of audio frequency currents with reduced distortion has at least one pair of electrical conductors insulated from one another. A ferromagnetic foil is closely (less than one half millimeter) applied to the conductors. The ferromagnetic foil couples the equal and opposite external magnetic fields generated by the signal currents. This greatly reduces distortion due to the frequency-dependent magnetic effects on signal transmission.
Claims18
A cable for the flow of audio frequency electrical currents with reduced distortion when in use, said currents generating magnetic fields, said cable comprising:
- a plurality of elongate electrical conductors electrically insulated from one another:
- a ferromagnetic foil means magnetically enclosing said conductors in a substantially symmetrical and continuous layer, said foil means spaced apart from each of said conductors by a distance that is less than five-tenths of a millimeter at its closest point, wherein said foil means couples together magnetic fields generated about each of said conductors by said electrical currents, wherein said currents flow in opposite directions with a net current flow of substantially zero and said magnetic fields pass through said layer in substantially equal and opposite continuous closed paths so that the effect of said foil on said magnetic fields is substantially equal and opposite, whereby the distorting effects of magnetic field variation with frequency are reduced.
A cable for the transmission of audio frequency electrical currents with reduced distortion when in use, said currents generating magnetic fields, said cable comprising:
- a) at least one pair of electrical conductors insulated from one another and arranged for carrying a common audio frequence current in opposite directions;
- b) a ferromagnetic foil encircling said electrical conductors and located at the closest point within a distance of five-tenths of a millimeter of each said conductor;
- c) each member of at least one pair of said conductors being positioned substantially in the same orientation relative to said foil, said foil forming a substantially continuously encircling, closed path for magnetic fields in which said path for magnetic fields generated by electric currents in a first member of said pair is substantially the same closed path as said path for magnetic fields generated by electrical currents in a second member of said pair and the direction is opposite, so that the effect of said foil on magnetic fields generated by said current is substantially equal and opposite, whereby the distorting effects of magnetic field variation with frequency are reduced.
A cable for transmission of audio frequency electrical currents with reduced distortion, said cable comprising:
- a) at least one pair of elongate electrical conductors insulated from one another and arranged for carrying a common audio frequency current of equal amplitude and opposite directions;
- b) a ferromagnetic foil means for magnetically enclosing said at least one conductor pair, said foil means helically wound about all said conductors and spaced apart from each of said conductors by electrical insulation thickness that is less than five-tenth of a millimeter at its closest point, said foil forming a substantially continuously encircling closed path for magnetic fields in which said path for magnetic fields generated by electric currents in a first member of said pair is substantially the same as said path for magnetic fields generated by electric currents in a second member of said pair and the direction is opposite, wherein said foil means couples together the magnetic field generated about each of said conductors by said electrical currents to reduce distortion from magnetic field losses.
Dependencies are inferred from the claim text.