Band-pass filter and gain stage

Details Band-pass filter and gain stage Band-pass filter and gain stage

1978-07-13

1981-05-19

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

330174, 333189, H03H 956, H03H 952, H03H 1104

Patent

active

042688078

ABSTRACT:
A band-pass filter and gain stage which produces a desired passband at a preselected center frequency. The present invention can be characterized as being a very passive frequency door whose output is lightly coupled to a broad band frequency amplifier having a high gain. The present invention includes an input connected to an input impedance stage, which is connected to a monolithic filter stage, which is connected to a second impedance stage, which is connected to a gain stage, which, in turn, is connected to an output terminal. A piezoelectric quartz crystal monolithic filter or a piezoelectric ceramic monolithic filter can be employed depending on the width desired for the passband response.

REFERENCES:
patent: 3319193 (1967-05-01), Barnett
patent: 3569873 (1971-03-01), Beaver
patent: 4023112 (1977-05-01), Duncker et al.

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