Multi-resonator crystal filter having a reduced number of pins a

Details Multi-resonator crystal filter having a reduced number of pins a Multi-resonator crystal filter having a reduced number of pins a

1981-01-05

1982-07-27

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

29 2535, 324 56, 333192, H03H 304, H03H 956, H03H 915

Patent

active

043420141

ABSTRACT:
A multi-resonator crystal filter is provided having a reduced number of electrical connecting pins. The monolithic crystal filter includes at least four resonators, namely, an input resonator, an output resonator and electrically coupled center resonators. A single electrical pin connection is made to the electrically coupled together center resonators thus avoiding the need for an individual connecting pin for each resonator.

REFERENCES:
patent: 3756851 (1973-09-01), Rennick et al.
patent: 3992760 (1976-11-01), Roberts
patent: 4112147 (1978-09-01), Thompson
patent: 4281300 (1981-07-01), Arvanitis

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