A baw type acoustic resonator that can be reconfigured by this route, 1984 and

摘要

Filtering circuit with acoustic resonators baw type comprising at least a first and second quadripoles connected in cascade, said cells, each comprising a series branch (315, 325) provided with a first baw type acoustic resonator (311, 321, 331) and a parallel branch (316 and 326) provided with each of a baw type acoustic resonator (312, 322, 332), said first acoustic resonator (311, 321, 331) having a series resonant frequency substantially equal to the parallel resonance frequency of said second acoustic resonator (312, 322, 332), characterized in that the parallel branch (316, 336) of the first cell comprises a first capacitor (313) connected in series with the second resonator and, in parallel with said capacitor, a first switching transistor (314) for short - circuited said capacity.