Integrated EMI filter and thermal heat sink

Details Integrated EMI filter and thermal heat sink Integrated EMI filter and thermal heat sink

1990-05-07

1991-07-09

Picard, Leo P.

Electricity: conductors and insulators

Anti-inductive structures

Conductor transposition

333 81B, 361424, H05K 900, H01P 122

Patent

active

050307932

ABSTRACT:
The present invention discloses an apparatus that shields electronic equipment from electromagnetic interference. The apparatus is a partially enclosed box having a substantially enclosed cavity. Disposed within the cavity is electronic equipment that is either sensitive to or responsible for generating unwanted EMI radiation. Within each apparatus are cooling air openings. Within each opening is a heat sink device, dimensioned to provide a level of EMI filtering. The heat sink device has a dual function. First, as an EMI filter, it attenuates EMI radiation in the range of frequencies generated by or disruptive to the electronic equipment. Secondly, as a heat sink device, it transfers heat away from the apparatus. In this way, the apparatus of the present invention successfully provides an EMI filter that doubles as a heat sink.

REFERENCES:
patent: 3767884 (1973-10-01), Osepchuk et al.
patent: 4053731 (1977-10-01), Foerstner
Electromagnetic Shielding by Donald R. White and M. Mordiguion, vol. 3, Chapter 7, Section 7.2.5, Intereference Control Technologies, Inc., Gainsville, Va. 1988.

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