Electrical audio signal processing systems and devices – Noise or distortion suppression – Interpolation
Patent
1991-11-15
1993-06-22
Isen, Forester W.
Electrical audio signal processing systems and devices
Noise or distortion suppression
Interpolation
351 77, H04B 300
Patent
active
052221490
ABSTRACT:
In audio frequency high fidelity equipment, termination plugs for input ports and output ports of various types wherein the termination plugs include a conductive-film-covered ferromagnetic-core electrical damping element inductively coupled to potential signal carrying components. In an unbalanced configuration, an RCA-type plug may include a shorting loop between the center conductor and the shield wherein a loop or coil of conductively-clad ferromagnetic material is disposed around the shorting conductor forming a transformer circuit, the cladding being a shorted secondary. The cladding is a film of copper, gold or silver, which is preferably covered with electrical insulation. In a an embodiment for an output terminator plug for an RCA-type jack, the RCA-type plug includes an impedance matching load between the center conductor and the shell, the impedance matching load element being electrically coupled with a loop or coil of the cladded ferromagnetic material disposed around the impedance matching load element. In a still further embodiment, a balanced signal line connector may include a ferromagnetic loop or coil, appropriately clad in copper and insulated, wherein the loop is disposed to surround the entire shell portion, thereby enclosing both the shell and the balanced signal carrying lines. The signal carrying lines are preferably connected to ground through the shell and have in line a matched impedance load.
REFERENCES:
patent: 4543554 (1985-09-01), Muellenheim et al.
patent: 4885555 (1989-12-01), Palmer
patent: 5083101 (1992-01-01), Frederick
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