Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Patent
1986-10-15
1988-07-26
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
333185, 361399, 361401, 439620, H03H 700
Patent
active
047603577
ABSTRACT:
The metal case has an opening, which includes a first portion for accommodating an inlet socket, and a second portion of a box-shaped form with a bottom for arranging filter components therein. On a rear side of the metal case, there is provided a printed circuit board which includes a first portion for mounting the inlet socket, and a second portion for mounting the filter components corresponding to the first portion and second portion of the metal case, respectively. An earth portion of the filter components contact the metal case, whereas the other portions of the filter components are mounted to the printed circuit board without contacting the metal case. On the printed circuit board, terminals protruding from the rear side thereof are provided. Surrounding the second portion of the metal case, there is installed a resin case with a bottom in which holes corresponding to the terminals are formed to lead out the terminals therethrough. The printed circuit board is contained in the resin case and fixed therein. On a peripheral edge of the metal case, metal tongues are formed so as to extend outwardly and, the metal tongues are secured directly to a chassis of an apparatus by means of screws.
REFERENCES:
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patent: 4455538 (1984-06-01), Kinzler
patent: 4472693 (1984-09-01), Uemura et al.
patent: 4611185 (1986-09-01), Dirmeyer et al.
patent: 4620165 (1986-10-01), Kinzler
patent: 4622526 (1986-11-01), Schneider et al.
Ham Seung
LaRoche Eugene R.
Murata Manufacturing Co. Ltd.
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