Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Patent
1995-09-07
1998-09-29
Ledynh, Bot L.
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
330 68, H05K 900
Patent
active
058147616
ABSTRACT:
A passive Electromagnetic Interference (EMI) dissipation apparatus typically utilized with an active host component to reduce self-generated and externally-generated electromagnetic interference and to improve the performance of the host component is disclosed. The apparatus includes a housing and a circuit located within the housing. The circuit includes a plurality of pyramidal-shaped resonating chambers having internally conductive surfaces covered with a layer of electrically resistive material, a plurality of quartz resonators each mounted upon a damping compound, and a plurality of permanent magnets each including a magnetically permeable bar. The electromagnetic interference is dissipated in the circuit over a broad range of frequencies in the form of heat. In a preferred embodiment, the plurality of permanent magnets and the corresponding plurality of permeable bars are mounted within a common chamber located immediately below the base of each of the pyramidal-shaped resonating chambers. Each of the quartz resonators is placed upon a separate portion of viso-elastic damping compound arranged upon one of a pair of non-conductive plates. The pair of plates are then manipulated so as to sandwich the pyramidal-shaped resonating chambers and the permanent magnets and corresponding permeable bars. The sandwiched combination forms the circuit which dissipates the electromagnetic interference and is then positioned and sealed within the non-conductive housing.
REFERENCES:
patent: 3626345 (1971-12-01), Funski
patent: 5206796 (1993-04-01), Thompson et al.
patent: 5239126 (1993-08-01), Oshiba
patent: 5313371 (1994-05-01), Knecht et al.
patent: 5621263 (1997-04-01), Kaida
Christopher John S.
Ledynh Bot L.
Ngo Hung V.
Shakti Audio Innovations
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