Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1982-07-07
1984-11-20
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
29 2535, 310348, 333189, 333192, H03H 905, H03H 956
Patent
active
044841582
ABSTRACT:
A multi-resonator crystal body is physically supported by electrical lead wires extending from a support substrate having individual shaped electrical conductors thereon which are thus connected to each resonator on the crystal body such that the individual resonator electrodes can be selectively short-circuited, or open-circuited, or displayed to an external electrical network to facilitate final finishing of the resonator electrodes. Predetermined electrical circuits (e.g. a short-circuit effected by conductive cement or paint) are thereafter connected across some of the resonator electrodes via the shaped conductive areas on the support substrate before the entire assembly is encapsulated in a standard pin connector housing arrangement. Besides greatly facilitating the tuning of individual crystal resonators to desired frequencies during the finishing operation, this mounting arrangement is also believed to provide improved temperature characteristics and/or shock mounting of the crystal body.
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patent: 3656180 (1972-04-01), Braun
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patent: 3828210 (1974-08-01), Livenick et al.
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patent: 4297659 (1981-10-01), Augst
patent: 4342014 (1982-07-01), Arvanitis
patent: 4343827 (1982-08-01), Thompson
Caruso-"Hermetically Sealed Crystal Device Having Glass Lasing Window", Western Electric Technical Digest, No. 48, Oct. 1977; pp. 9-10.
IEEE Transactions on Sonics and Ultrasonics, Oct. 1973, vol. Su-20, No. 4-An Equivalent Circuit Approach to the Design and Analysis of Monolithic Crystal Filters.
Roberts Gerald E.
Staples Alfred G.
General Electric Company
Nussbaum Marvin L.
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