Acoustic resonator filter with electrically variable center freq

Details Acoustic resonator filter with electrically variable center freq Acoustic resonator filter with electrically variable center freq

1992-07-20

1994-03-01

Nelli, Raymond A.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333174, H03H 900

Patent

active

052911594

ABSTRACT:
An acoustic resonator filter having at least one of electronically variable center frequency and bandwidth has a shunt coupling consisting of an inductor and voltage variable capacitor matrix. A pair of acoustic resonators each having a parallel inductor are connected to each other and to the shunt coupling network. One of a pair of voltage variable capacitor matrixes each having a center frequency command input voltage is connected to each acoustic resonator and an associated inductor. This circuit can be extended to provide more selectivity and attenuation.

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The Analysis, Design and Synthesis of Electrical Filters by DeVerl S. Humpherys, pp. 488-495.

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