Ladder-type electric filter device

Details Ladder-type electric filter device Ladder-type electric filter device

1992-07-08

1994-07-26

Nelli, Raymond A.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333190, H03H 900

Patent

active

053329821

ABSTRACT:
A ladder-type electric filter comprising an input terminal, an output terminal, a plurality of series-resonators connected in series between said input terminal and said output terminal and a plurality of parallel-resonators each connected in parallel to the associated series-resonator, wherein each series-resonator has capacitance greater than that of the preceding series-resonator for improving a group delay time characteristic.

REFERENCES:
patent: 4323865 (1962-04-01), Tanaka et al.
patent: 4651109 (1987-03-01), Inoue
patent: 4716377 (1987-12-01), Inoue
patent: 4837533 (1989-06-01), Oshikawa
patent: 4841264 (1989-06-01), Oshikawa
patent: 4864259 (1989-09-01), Takamoro et al.
patent: 5057802 (1991-10-01), Ozeki et al.
patent: 5075650 (1991-12-01), Okamura et al.
patent: 5130680 (1992-07-01), Nagai et al.
patent: 5159302 (1992-10-01), Tanaka

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